front 1 A patient with impaired renal function accumulates urea and an administered drug metabolite. Which kidney function best explains why this occurs? A) Erythrocyte destruction regulation B) Waste and foreign chemical excretion C) Pulmonary acid buffering D) Intracellular protein synthesis | back 1 B. Waste and foreign chemical excretion |
front 2 Which set includes major renal homeostatic functions rather than primarily hepatic or pulmonary functions? A) Bile storage; surfactant secretion B) Platelet activation; bile synthesis C) Insulin release; bile metabolism D) Osmolality control; acid-base regulation | back 2 D. Osmolality control; acid-base regulation |
front 3 A patient with chronic kidney disease develops anemia, hypertension, and fluid overload. Which renal functions are impaired in this pattern? A) EPO secretion; pressure regulation B) Bile production; glucose storage C) Surfactant synthesis; sodium excretion D) Platelet production; acid excretion | back 3 A. EPO secretion; pressure regulation |
front 4 Which paired kidney functions help maintain body fluid composition most directly? A) Renin breakdown; bile concentration B) Platelet regulation; protein digestion C) Water balance; electrolyte balance D) CO2 excretion; surfactant production | back 4 C. Water balance; electrolyte balance |
front 5 For long-term homeostasis, renal excretion of water and electrolytes must precisely match which variable? A) Plasma oncotic pressure B) Daily intake C) Hematocrit D) Capillary permeability | back 5 B. Daily intake |
front 6 A patient suddenly increases dietary sodium intake. Which renal response is required to reestablish sodium balance? A) Lower sodium excretion below intake B) Stop sodium filtration immediately C) Increase sodium excretion to intake D) Shift sodium into red cells | back 6 C. Increase sodium excretion to intake |
front 7 During the first 2 to 3 days after increased sodium intake, why does extracellular fluid volume rise slightly? A) Sodium transiently accumulates modestly B) Plasma proteins enter cells rapidly C) Renin immediately stops filtration D) Sodium exits through sweat only | back 7 A. Sodium transiently accumulates modestly |
front 8 A person adapts to high sodium intake over several days. Which response signals the kidneys to increase sodium excretion? A) Reduced extracellular fluid volume B) Increased erythropoietin release C) Hormonal and compensatory changes D) Decreased plasma sodium filtration | back 8 C. Hormonal and compensatory changes |
front 9 A patient’s sodium intake increases to more than 10 times normal, yet plasma sodium changes only slightly. Which renal ability best explains this? A) Fixed sodium excretion D) Variable sodium excretion C) Complete sodium storage D) Absent water regulation | back 9 B. Variable sodium excretion The kidneys can adjust (vary) sodium excretion over a huge range to match intake. |
front 10 The kidneys play a dominant role in long-term arterial pressure regulation by varying excretion of which substances? A) Sodium and water B) Protein and glucose C) Calcium and albumin D) Hydrogen and bicarbonate | back 10 A. Sodium and water |
front 11 A patient has chronic salt-sensitive hypertension. Which renal mechanism most directly contributes to long-term arterial pressure regulation? A) Erythropoietin release B) Calcitriol production C) Sodium-water excretion D) Drug metabolism | back 11 C. Sodium-water excretion |
front 12 The kidneys contribute to short-term arterial pressure regulation by secreting renin, which promotes formation of which vasoactive product? A) Aldosterone B) Angiotensin II C) Erythropoietin D) Calcitriol | back 12 B. Angiotensin II |
front 13 Which pairing best distinguishes renal long-term versus short-term arterial pressure control? A) Sodium-water excretion; vasoactive hormones B) EPO secretion; calcitriol activation C) Acid excretion; glucose synthesis D) Osmolality control; drug metabolism | back 13 A. Sodium-water excretion; vasoactive hormones |
front 14 A patient with renal failure develops metabolic acidosis. Which renal function is most directly impaired? A) Oxygen diffusion regulation B) Platelet activation regulation C) Acid-base regulation D) Surfactant metabolism | back 14 C. Acid-base regulation |
front 15 The kidneys contribute to acid-base homeostasis along with which other systems? A) Lungs and body fluid buffers B) Liver and pancreatic enzymes C) Bone marrow and spleen D) Skin and lymphatics | back 15 A. Lungs and body fluid buffers |
front 16 Which renal action directly supports acid-base regulation? A) Secreting bile salts B) Excreting acids C) Producing hemoglobin D) Absorbing oxygen | back 16 B. Excreting acids |
front 17 How do the kidneys help maintain body fluid buffer stores? A) By regulating buffer stores B) By destroying bicarbonate C) By producing plasma albumin D) By secreting surfactant | back 17 A. By regulating buffer stores |
front 18 A patient with chronic kidney disease develops normocytic anemia. Loss of which renal hormone best explains this finding A) Angiotensin II B) Calcitriol C) Aldosterone D) Erythropoietin | back 18 D. Erythropoietin |
front 19 Erythropoietin secreted by the kidneys primarily acts on which target tissue? A) Hepatic sinusoidal cells B) Bone marrow stem cells C) Pancreatic beta cells D) Renal collecting ducts | back 19 B. Bone marrow stem cells |
front 20 Which sequence best describes the renal role in erythrocyte production? A) Kidney secretes EPO; marrow produces RBCs B) Kidney secretes renin; liver makes RBCs C) Kidney activates vitamin D; spleen makes RBCs D) Kidney excretes acid; plasma makes RBCs | back 20 A. Kidney secretes EPO; marrow produces RBCs |
front 21 A patient with renal failure develops impaired calcium and phosphate regulation because active vitamin D production falls. Which renal reaction is deficient? A) 25-hydroxylation in liver B) Number 24 hydroxylation C) Number 1 hydroxylation D) Intestinal vitamin D absorption | back 21 C. Number 1 hydroxylation |
front 22 Which active vitamin D form is produced by the kidneys? A) Cholecalciferol B) 25-hydroxyvitamin D C) 1,25-dihydroxyvitamin D3 D) 7-dehydrocholesterol | back 22 C. 1,25-dihydroxyvitamin D3 |
front 23 A nephron cell hydroxylates vitamin D at the number 1 position. What product is formed? A) Calcitriol B) Erythropoietin C) Renin D) Aldosterone | back 23 A. Calcitriol |
front 24 A patient with advanced kidney disease develops impaired intestinal calcium absorption and abnormal bone mineralization. Loss of which renal product best explains both findings? A) Renin B) Calcitriol C) Erythropoietin D) Angiotensin II | back 24 B. Calcitriol |
front 25 Which pairing best describes the physiologic importance of calcitriol produced by the kidneys? A) Sodium wasting; potassium secretion B) RBC production; acid excretion C) Bone calcium deposition; GI calcium reabsorption D) Glucose storage; urea synthesis | back 25 C. Bone calcium deposition; GI calcium reabsorption |
front 26 A patient fasts for several days. Besides the liver, which renal metabolic process helps maintain blood glucose? A) Glycogenolysis from renal glycogen B) Gluconeogenesis from amino acids C) Ketogenesis from filtered albumin D) Glycolysis from urinary glucose | back 26 B. Gluconeogenesis from amino acids |
front 27 During prolonged fasting, the kidneys synthesize glucose from amino acids and other precursors. What is this process called A) Gluconeogenesis B) Glycogenesis C) Glycogenolysis D) Lipogenesis | back 27 A. Gluconeogenesis |
front 28 A patient with acute renal failure rapidly develops abnormal body fluid volumes and electrolyte composition. Which broad renal role has been disrupted? A) Pulmonary gas exchange B) Homeostatic regulation C) Hepatic bile secretion D) Splenic blood filtration | back 28 B. Homeostatic regulation |
front 29 A trauma surgeon enters the peritoneal cavity and notes the kidneys are not intraperitoneal organs. Where are the kidneys normally located? A) Anterior intraperitoneal abdomen B) Posterior abdominal wall C) Pelvic peritoneal cavity D) Thoracic posterior mediastinum | back 29 B. Posterior abdominal wall |
front 30 Which description best matches the normal gross size of each adult human kidney? A) 50 g; thumb-sized B) 150 g; clenched-fist-sized C) 300 g; palm-sized D) 500 g; liver-lobe-sized | back 30 B. 150 g; clenched-fist-sized |
front 31 A renal artery, renal vein, lymphatics, nerves, and ureter enter or exit through an indented medial kidney region. What is this region called? A) Papilla B) Calyx C) Hilum D) Pyramid | back 31 C. Hilum |
front 32 Which set contains structures that pass through the renal hilum? A) Artery, vein, ureter, nerves B) Cortex, capsule, papilla, pelvis C) Glomerulus, tubule, collecting duct D) Pyramid, calyx, nephron, capsule | back 32 A. Artery, vein, ureter, nerves |
front 33 A stone obstructs the tube carrying final urine from the kidney to the bladder. Which structure is obstructed? A) Renal vein B) Ureter C) Minor calyx D) Efferent arteriole | back 33 B. Ureter |
front 34 The bladder stores final urine until which event occurs? A) Glomerular filtration B) Bladder emptying C) Peritubular reabsorption D) Renal hydroxylation | back 34 B. Bladder emptying |
front 35 Which structure surrounds the kidney and protects its delicate inner structures? A) Fibrous capsule B) Renal pelvis C) Peritoneal sac D) Glomerular membrane | back 35 A. Fibrous capsule |
front 36 The renal medulla is organized into cone-shaped masses of tissue. Which name and number best match these structures? A) Calyces; 2 to 3 B) Pyramids; 8 to 10 C) Papillae; 20 to 30 D) Glomeruli; 1 to 2 | back 36 B. Pyramids; 8 to 10 |
front 37 A renal pyramid extends from the corticomedullary border toward the collecting space. Where does its tip terminate? A) Hilum B) Capsule C) Papilla D) Arcuate artery | back 37 C. Papilla |
front 38 The papilla of a renal pyramid projects into which funnel-shaped collecting space continuous with the ureter? A) Renal pelvis B) Renal capsule C) Renal cortex D) Renal vein | back 38 A. Renal pelvis |
front 39 Which pairing best describes the base and tip of a renal pyramid? A) Base at pelvis; tip at cortex B) Base at capsule; tip at hilum C) Base at hilum; tip at capsule D) Base corticomedullary; tip papilla | back 39 D. Base corticomedullary; tip papilla |
front 40 The renal pelvis divides into open-ended pouches that further divide to collect urine from papillae. Which sequence is correct? A) Minor calyces → major calyces B) Major calyces → minor calyces C) Papillae → pyramids → cortex D) Ureter → capsule → papilla | back 40 B. Major calyces → minor calyces |
front 41 Which structure directly collects urine from the tubules of each renal papilla? A) Minor calyx B) Major calyx C) Renal artery D) Renal capsule | back 41 A. Minor calyx |
front 42 A renal artery enters the hilum and branches toward glomerular capillaries. Which arterial sequence is correct? A) Interlobar → arcuate → interlobular → afferent B) Arcuate → interlobar → afferent → interlobular C) Interlobular → arcuate → interlobar → afferent D) Afferent → interlobular → arcuate → interlobar | back 42 A. Interlobar → arcuate → interlobular → afferent |
front 43 Which renal vessel directly leads into the glomerular capillary network? A) Efferent arteriole B) Interlobar artery C) Afferent arteriole D) Peritubular capillary | back 43 C. Afferent arteriole |
front 44 A patient’s urine formation begins when fluid and most solutes leave plasma into Bowman space. Which capillary bed performs this filtration? A) Peritubular capillaries B) Glomerular capillaries C) Vasa recta only D) Cortical venules | back 44 B. Glomerular capillaries |
front 45 During glomerular filtration, which plasma component is normally largely excluded from the filtrate? A) Sodium B) Glucose C) Water D) Plasma proteins | back 45 D. Plasma proteins |
front 46 The distal ends of glomerular capillaries coalesce to form which vessel? A) Afferent arteriole B) Efferent arteriole C) Interlobular artery D) Arcuate vein | back 46 B. Efferent arteriole |
front 47 The efferent arteriole leaving the glomerulus leads to which second capillary network? A) Peritubular capillaries B) Pulmonary capillaries C) Portal sinusoids D) Splenic sinusoids | back 47 A. Peritubular capillaries |
front 48 Peritubular capillaries are positioned to exchange substances with which renal structure? A) Renal capsule B) Renal tubules C) Renal pelvis D) Renal papilla | back 48 B. Renal tubules |
front 49 What makes the renal circulation unusual compared with most systemic circulations? A) Two capillary beds in series B) No arterioles before capillaries C) Venous blood enters glomeruli D) Plasma proteins are freely filtered | back 49 A. Two capillary beds in series |
front 50 Which two capillary beds are arranged in series in the renal circulation? A) Portal; sinusoidal capillaries B) Pulmonary; bronchial capillaries C) Glomerular; peritubular capillaries D) Splenic; hepatic capillaries | back 50 C. Glomerular; peritubular capillaries |
front 51 In the renal circulation, what vessel separates the glomerular and peritubular capillary beds? A) Afferent arteriole B) Efferent arteriole C) Interlobar artery D) Arcuate vein | back 51 B. Efferent arteriole |
front 52 By sitting between two capillary beds, the efferent arteriole helps regulate what variable in both capillary networks? A) Hydrostatic pressure B) Plasma glucose C) Red cell production D) Urine pH | back 52 A. Hydrostatic pressure |
front 53 A renal capillary bed has hydrostatic pressure near 60 mm Hg and supports rapid filtration. Which capillary bed is being described? A) Peritubular capillaries B) Glomerular capillaries C) Vasa recta D) Cortical veins | back 53 B. Glomerular capillaries |
front 54 A capillary network surrounding renal tubules has hydrostatic pressure near 13 mm Hg. What process does this low pressure favor? A) Rapid fluid filtration B) Rapid fluid reabsorption C) Plasma protein excretion D) Glomerular capsule filling | back 54 B. Rapid fluid reabsorption |
front 55 Which paired capillary pressure values best match normal renal circulation? A) Glomerular 60; peritubular 13 B) Glomerular 13; peritubular 60 C) Glomerular 25; peritubular 25 D) Glomerular 110; peritubular 60 | back 55 A. Glomerular 60; peritubular 13 |
front 56 Which statement best describes the functional capacity of each nephron? A) Each can form urine B) Each stores final urine C) Each secretes erythropoietin D) Each drains multiple kidneys | back 56 A. Each can form urine |
front 57 After renal injury destroys nephrons, which statement best describes nephron replacement? A) Nephrons regenerate rapidly B) Nephrons regenerate slowly C) Nephrons cannot regenerate D) Nephrons double after injury | back 57 C. Nephrons cannot regenerate |
front 58 Which pair correctly identifies the two major structural components of each nephron? A) Glomerulus and long tubule B) Pyramid and renal pelvis C) Ureter and collecting duct D) Calyx and renal capsule | back 58 A. Glomerulus and long tubule |
front 59 A nephron filters large amounts of fluid from blood through a tuft of capillaries. What is this capillary tuft called? A) Macula densa B) Glomerulus C) Vasa recta D) Papilla | back 59 B. Glomerulus |
front 60 After fluid is filtered at the glomerulus, what nephron structure modifies it into urine as it travels toward the renal pelvis? A) Long tubule B) Renal artery C) Fibrous capsule D) Cortical vein | back 60 A. Long tubule |
front 61 The glomerular capillaries are covered by epithelial cells and enclosed within which structure? A) Renal pelvis B) Bowman’s capsule C) Minor calyx D) Cortical duct | back 61 B. Bowman’s capsule |
front 62 Which sequence best describes early filtrate flow after glomerular filtration? A) Bowman’s capsule → proximal tubule B) Proximal tubule → Bowman’s capsule C) Distal tubule → Bowman’s capsule D) Collecting duct → proximal tubule | back 62 A. Bowman’s capsule → proximal tubule |
front 63 The proximal tubule lies primarily in which kidney region? A) Renal medulla B) Renal pelvis C) Renal cortex D) Renal papilla | back 63 C. Renal cortex |
front 64 After leaving Bowman’s capsule, filtrate first enters which nephron segment? A) Distal tubule B) Proximal tubule C) Collecting duct D) Loop of Henle | back 64 B. Proximal tubule |
front 65 From the proximal tubule, filtrate enters a segment that dips into the renal medulla. Which structure is this? A) Loop of Henle B) Distal tubule C) Cortical duct D) Macula densa | back 65 A. Loop of Henle |
front 66 Which paired limbs make up the loop of Henle? A) Medial and lateral B) Proximal and distal C) Descending and ascending D) Cortical and medullary | back 66 C. Descending and ascending |
front 67 A nephron segment descends into the medulla and then ascends back toward the cortex. Which segment is being described? A) Proximal tubule B) Loop of Henle C) Collecting duct D) Bowman’s capsule | back 67 B. Loop of Henle |
front 68 A plaque of specialized epithelial cells sits in the wall near the end of the thick ascending limb. What is it called? A) Macula densa B) Renal papilla C) Bowman capsule D) Vasa recta | back 68 A. Macula densa |
front 69 Where is the macula densa located within the nephron? A) Start of proximal tubule B) End of thick ascending limb C) Base of collecting duct D) Tip of renal papilla | back 69 B. End of thick ascending limb |
front 70 After filtrate passes the macula densa, which segment does it enter next? A) Proximal tubule B) Distal tubule C) Descending limb D) Bowman’s capsule | back 70 B. Distal tubule |
front 71 Like the proximal tubule, the distal tubule is located in which kidney region? A) Cortex B) Medulla C) Pelvis D) Papilla | back 71 A. Cortex |
front 72 Which sequence best follows the distal tubule? A) Proximal tubule → loop B) Connecting tubule → cortical collecting tubule C) Papilla → minor calyx D) Bowman’s capsule → glomerulus | back 72 B. Connecting tubule → cortical collecting tubule |
front 73 The connecting tubule and cortical collecting tubule ultimately lead into which structure? A) Cortical collecting duct B) Proximal convoluted tubule C) Afferent arteriole D) Renal pelvis | back 73 A. Cortical collecting duct |
front 74 For cortical nephrons, the tubular system is surrounded by what capillary network? A) Glomerular capillaries B) Peritubular capillaries C) Pulmonary capillaries D) Portal capillaries | back 74 B. Peritubular capillaries |
front 75 Which medullary capillary network is essential for forming concentrated urine? A) Peritubular plexus B) Glomerular tuft C) Vasa recta D) Arcuate veins | back 75 C. Vasa recta |
front 76 The vasa recta return toward the cortex and empty into which vessels? A) Cortical veins B) Renal pelvis C) Afferent arterioles D) Major calyces | back 76 A. Cortical veins |
front 77 What term describes the process by which the urinary bladder empties when filled? A) Filtration B) Micturition C) Reabsorption D) Secretion | back 77 B. Micturition |
front 78 Which definition best matches micturition? A) Kidney filters plasma B) Bladder empties urine C) Tubule reabsorbs sodium D) Ureter transports filtrate | back 78 B. Bladder empties urine |
front 79 During bladder filling, what rising variable triggers the reflex pathway for urination? A) Wall tension B) Plasma osmolarity C) Renal blood flow D) Glomerular pressure | back 79 A. Wall tension |
front 80 Which sequence best describes the two main steps of micturition? A) Filtration then reabsorption B) Bladder tension then reflex C) Renin release then thirst D) Sodium loss then osmosis | back 80 B. Bladder tension then reflex |
front 81 If the micturition reflex fails to empty the bladder, what does it at least usually cause? A) Complete renal shutdown B) Conscious desire to urinate C) Loss of glomerular filtration D) Increased nephron regeneration | back 81 B. Conscious desire to urinate |
front 82 A patient’s bladder is described as having a major urine-collecting region and a funnel-shaped outlet that continues into the urethra. Which pairing correctly identifies these two bladder parts? A) Trigone; papilla B) Body; neck C) Fundus; calyx D) Cortex; pelvis | back 82 B. Body; neck |
front 83 The major portion of the urinary bladder where urine accumulates before voiding is called the: A) Neck B) Trigone C) Body D) Urethra | back 83 C. Body |
front 84 The bladder neck is best described as which structure? A) Funnel-shaped urethral extension B) Smooth triangular mucosal area C) Major urine storage chamber D) Skeletal sphincter ring | back 84 A. Funnel-shaped urethral extension |
front 85 The bladder neck passes inferiorly and anteriorly into which region before connecting with the urethra? A) Renal pelvis B) Peritoneal cavity C) Sacral canal D) Urogenital triangle | back 85 D. Urogenital triangle |
front 86 A physician explains that bladder emptying depends mainly on contraction of the bladder’s smooth muscle coat. What is this muscle called? A) External sphincter B) Detrusor muscle C) Cremaster muscle D) Levator ani | back 86 B. Detrusor muscle |
front 87 A cystoscopic exam identifies a small triangular region on the posterior bladder wall immediately above the bladder neck. What is this region? A) Ureteric papilla B) Bladder body C) Bladder trigone D) External sphincter | back 87 C. Bladder trigone |
front 88 Which mucosal feature distinguishes the trigone from most of the bladder lining? A) Folded rugae B) Smooth mucosa C) Ciliated epithelium D) Keratinized surface | back 88 B. Smooth mucosa |
front 89 Most bladder mucosa differs from trigone mucosa because it forms which structure? A) Rugae B) Papillae C) Pyramids D) Calyces | back 89 A. Rugae |
front 90 The posterior urethra corresponds anatomically to which bladder region? A) Bladder body B) Bladder neck C) Bladder trigone D) Urogenital diaphragm | back 90 B. Bladder neck |
front 91 Which tissue combination best describes the wall of the bladder neck? A) Skeletal muscle; cartilage B) Detrusor muscle; elastic tissue C) Mucosa only; smooth rugae D) Fibrous capsule; renal pelvis | back 91 B. Detrusor muscle; elastic tissue |
front 92 After passing beyond the posterior urethra, the urethra traverses which muscular structure? A) Urogenital diaphragm B) Renal hilum C) Pelvic brim D) Bladder trigone | back 92 A. Urogenital diaphragm |
front 93 The urogenital diaphragm contains which bladder-associated sphincter? A) Internal urethral sphincter B) External bladder sphincter C) Detrusor sphincter D) Trigonal sphincter | back 93 B. External bladder sphincter |
front 94 A patient voluntarily stops urination midstream. Which muscle type permits this control? A) Smooth detrusor muscle B) Visceral smooth muscle C) Voluntary skeletal muscle D) Involuntary cardiac muscle | back 94 C. Voluntary skeletal muscle |
front 95 Which structure is voluntary skeletal muscle rather than smooth muscle? A) Bladder body B) Bladder neck C) External sphincter D) Detrusor muscle | back 95 C. External sphincter |
front 96 Which pairing correctly contrasts bladder wall muscle with the external sphincter? A) Smooth; skeletal B) Skeletal; smooth C) Cardiac; skeletal D) Smooth; cardiac | back 96 A. Smooth; skeletal |
front 97 The principal nerve supply to the urinary bladder travels through which nerves? A) Hypogastric nerves B) Pelvic nerves C) Pudendal nerves D) Femoral nerves | back 97 B. Pelvic nerves |
front 98 The pelvic nerves supplying the bladder connect with the spinal cord mainly through which plexus? A) Lumbar plexus B) Sacral plexus C) Cervical plexus D) Celiac plexus | back 98 B. Sacral plexus |
front 99 The main sacral spinal cord segments associated with pelvic nerve supply to the bladder are: A) S1 and S2 B) S2 and S3 C) S3 and S4 D) S4 and S5 | back 99 B. S2 and S3 |
front 100 Which fiber types course through the pelvic nerves supplying the bladder? A) Sensory and motor fibers B) Motor fibers and sympathetic fibers C) Sensory fibers and sympathetic fibers D) Sympathetic fibers and parasympathetic fibers | back 100 A. Sensory and motor fibers |
front 101 The motor fibers carried in the pelvic nerves to the bladder are primarily: A) Somatic fibers B) Sympathetic fibers C) Parasympathetic fibers D) Visceral sensory fibers | back 101 C. Parasympathetic fibers |
front 102 A spinal lesion interrupts the parasympathetic motor supply carried to the bladder. Which nerve pathway is most directly affected? A) Hypogastric nerves B) Pelvic nerves C) Lumbar sympathetic chain D) Pudendal nerves | back 102 B. Pelvic nerves |
front 103 The bladder receives sympathetic innervation from the sympathetic chain primarily through which nerves? A) Pelvic nerves B) Hypogastric nerves C) Pudendal nerves D) Obturator nerves | back 103 B. Hypogastric nerves |
front 104 Sympathetic innervation to the bladder connects mainly with which spinal cord segment? A) T10 B) T12 C) L2 D) S3 | back 104 C. L2 |
front 105 Which pairing best matches bladder autonomic pathways with their main spinal levels? A) Pelvic S2-S3; hypogastric L2 B) Pelvic L2; hypogastric S2-S3 C) Pudendal T10; pelvic L2 D) Hypogastric S3; pudendal L2 | back 105 A. Pelvic S2-S3; hypogastric L2 |
front 106 Peristaltic contractions in the ureter are enhanced by which autonomic input? A) Sympathetic stimulation B) Parasympathetic stimulation C) Somatic motor stimulation D) Visceral sensory inhibition | back 106 B. Parasympathetic stimulation |
front 107 Peristaltic contractions in the ureter are inhibited by which autonomic input? A) Parasympathetic stimulation B) Somatic motor stimulation C) Sympathetic stimulation D) Pelvic sensory stimulation | back 107 C. Sympathetic stimulation |
front 108 The ureters enter the bladder through the detrusor muscle in which bladder region? A) Bladder dome B) Bladder neck C) Bladder trigone D) Urogenital diaphragm | back 108 C. Bladder trigone |
front 109 A child has urine propelled backward from the bladder into the ureter during voiding. What is this condition called? A) Hydronephrosis B) Vesicoureteral reflux C) Nephrotic reflux D) Urethrovesical obstruction | back 109 B. Vesicoureteral reflux |
front 110 Severe vesicoureteral reflux can directly cause which anatomic change? A) Ureteral enlargement B) Bladder neck shortening C) Trigone disappearance D) External sphincter paralysis | back 110 A. Ureteral enlargement |
front 111 Severe vesicoureteral reflux can damage the kidney by increasing pressure in which structures? A) Glomeruli and cortex B) Renal calyces and medulla C) Ureter and bladder body D) Pelvic nerves and sphincter | back 111 B. Renal calyces and medulla |
front 112 A patient with an obstructing ureteral stone has severe ureteral pain and decreased urine output from the affected kidney. Which reflex best explains this response? A) Micturition reflex B) Ureterorenal reflex C) Baroreceptor reflex D) Tubuloglomerular reflex | back 112 B. Ureterorenal reflex |
front 113 In the ureterorenal reflex, pain impulses trigger sympathetic activity that causes which renal vascular change? A) Renal arteriole constriction B) Renal vein dilation C) Glomerular capillary rupture D) Peritubular capillary dilation | back 113 A. Renal arteriole constriction |
front 114 A patient has a blocked ureter. Why does the ureterorenal reflex decrease urine output from that kidney? A) To increase bladder pressure B) To stimulate ureteral peristalsis C) To prevent excess pelvic flow D) To inhibit renal pain fibers | back 114 C. To prevent excess pelvic flow |
front 115 As the bladder progressively fills, what begins to appear on the bladder pressure curve? A) Efferent arteriolar pulses B) Superimposed micturition contractions C) Portal pressure waves D) Renal pelvic filtrations | back 115 B. Superimposed micturition contractions |
front 116 A bladder begins contracting, which activates stretch receptors and increases sensory input from the bladder and posterior urethra. What kind of reflex pattern is this? A) Self-regenerative reflex B) Completely voluntary reflex C) Purely sympathetic reflex D) Renal autoregulatory reflex | back 116 A. Self-regenerative reflex |
front 117 Which sequence best captures the self-regenerative micturition reflex? A) Contraction; stretch; more contraction B) Relaxation; stretch; less contraction C) Pain; arteriole constriction; oliguria D) Cortex; sphincter contraction; storage | back 117 A. Contraction; stretch; more contraction |
front 118 During a self-regenerative micturition reflex, initial bladder contraction increases sensory impulses mainly from which structures? A) Cortex and pons B) Kidney and ureter C) Bladder and posterior urethra D) Ureter and renal pelvis | back 118 C. Bladder and posterior urethra |
front 119 What causes the micturition reflex to amplify once it has started? A) Falling bladder wall tension B) Reduced posterior urethral input C) Increased stretch receptor activation D) Sympathetic inhibition of detrusor | back 119 C. Increased stretch receptor activation |
front 120 After the micturition reflex reaches strong contraction, what typically happens after seconds to more than a minute? A) Reflex fatigues and relaxes B) Bladder pressure rises indefinitely C) External sphincter contracts permanently D) Kidney stops filtering completely | back 120 A. Reflex fatigues and relaxes |
front 121 The micturition reflex consists of which pressure sequence? A) Slow fall; plateau; spike B) Rapid rise; sustained pressure; return C) Plateau; rapid fall; rebound D) Basal tone; filtration; secretion | back 121 B. Rapid rise; sustained pressure; return |
front 122 Which phase follows the rapid pressure increase during one complete micturition reflex cycle? A) Sustained pressure period B) Immediate renal constriction C) Complete sphincter fatigue D) Cortical inhibition only | back 122 A. Sustained pressure period |
front 123 If a micturition reflex occurs but fails to empty the bladder, when can another reflex usually occur? A) Immediately without delay B) After several days C) After bladder rupture D) Minutes to one hour later | back 123 D. Minutes to one hour later |
front 124 After an unsuccessful micturition reflex, why does another reflex not usually occur immediately? A) Reflex elements remain inhibited B) Stretch receptors are destroyed C) Pudendal nerves are severed D) Urine formation completely stops | back 124 A. Reflex elements remain inhibited |
front 125 Once the micturition reflex becomes sufficiently powerful, it triggers another reflex that acts on which structure? A) Renal pelvis B) External sphincter C) Ureteral papilla D) Glomerular capillaries | back 125 B. External sphincter |
front 126 A powerful micturition reflex promotes urination by causing what effect on the external bladder sphincter? A) It contracts forcefully B) It becomes inhibited C) It becomes fibrotic D) It blocks sensory input | back 126 B. It becomes inhibited |
front 127 Which nerve carries the reflex signal that inhibits the external sphincter during a strong micturition reflex? A) Hypogastric nerve B) Vagus nerve C) Pudendal nerve D) Phrenic nerve | back 127 C. Pudendal nerve |
front 128 The basic micturition reflex is best classified as which type of reflex? A) Autonomic spinal cord reflex B) Somatic cortical reflex C) Endocrine renal reflex D) Voluntary ureteral reflex | back 128 A. Autonomic spinal cord reflex |
front 129 Which statement best describes brain control over the micturition reflex? A) Brain centers only inhibit it B) Brain centers only facilitate it C) Brain centers cannot affect it D) Brain centers modulate it | back 129 D. Brain centers modulate it |
front 130 Strong facilitative and inhibitory centers for micturition are located mainly in which brain region? A) Cerebellum B) Pons C) Thalamus D) Medulla | back 130 B. Pons |
front 131 Besides the brainstem, higher control of micturition also involves centers in which region? A) Cerebral cortex B) Basal ganglia C) Spinal dorsal horn D) Renal medulla | back 131 A. Cerebral cortex |
front 132 Under normal conditions, what do higher centers do to the micturition reflex during bladder storage? A) Completely abolish it B) Partially inhibit it C) Fully activate it D) Convert it to pain | back 132 B. Partially inhibit it |
front 133 How can higher centers prevent urination even when the micturition reflex occurs? A) Relaxing the external sphincter B) Contracting the detrusor muscle C) Tonic external sphincter contraction D) Increasing ureteral peristalsis | back 133 C. Tonic external sphincter contraction |
front 134 A medical student delays urination despite bladder fullness. Which mechanism allows this voluntary postponement? A) Tonic external sphincter contraction B) Renal arteriole dilation C) Macula densa inhibition D) Papillary smooth muscle relaxation | back 134 A. Tonic external sphincter contraction |
front 135 When it is time to urinate, cortical centers help initiate voiding by facilitating which centers? A) Lumbar sympathetic centers B) Sacral micturition centers C) Hypothalamic thirst centers D) Renal autoregulatory centers | back 135 B. Sacral micturition centers |
front 136 During voluntary initiation of urination, cortical centers coordinate which paired actions? A) Facilitate sacral centers; inhibit sphincter B) Inhibit sacral centers; contract sphincter C) Constrict renal arterioles; inhibit bladder D) Stimulate ureters; close bladder neck | back 136 A. Facilitate sacral centers; inhibit sphincter |
front 137 A patient with a blocked ureter has pain-triggered renal arteriole constriction, while a full bladder has stretch-triggered detrusor contraction. Which pairing is correct? A) Micturition; ureterorenal B) Ureterorenal; micturition C) Pudendal; hypogastric D) Cortical; glomerular | back 137 B. Ureterorenal; micturition |
front 138 A patient intentionally begins urinating by increasing intra-abdominal pressure. Which initial voluntary action best explains this step? A) Contracts abdominal muscles B) Relaxes pelvic stretch receptors C) Contracts ureteral smooth muscle D) Inhibits sacral sensory fibers | back 138 A. Contracts abdominal muscles |
front 139 During voluntary urination, abdominal muscle contraction increases bladder pressure and pushes urine into which structures? A) Renal pelvis and calyces B) Bladder neck and posterior urethra C) Ureter and renal pelvis D) Trigone and renal cortex | back 139 B. Bladder neck and posterior urethra |
front 140 A person voluntarily strains to urinate, causing urine to enter the bladder neck and posterior urethra under pressure. What is the next key trigger? A) Detrusor ischemia B) Sodium retention C) Stretch receptor stimulation D) Renal arteriole constriction | back 140 C. Stretch receptor stimulation |
front 141 Stretch of the bladder neck and posterior urethra during voluntary urination produces which paired effect? A) Reflex excitation; sphincter inhibition B) Reflex inhibition; sphincter contraction C) Renal constriction; ureter relaxation D) Sympathetic activation; detrusor relaxation | back 141 A. Reflex excitation; sphincter inhibition |
front 142 A spinal injury destroys sensory fibers from the bladder to the spinal cord. Which consequence is most likely? A) Continuous forceful detrusor contraction B) Absent micturition reflex contraction C) Excessive voluntary sphincter control D) Increased renal sodium excretion | back 142 B. Absent micturition reflex contraction |
front 143 A patient’s bladder fills to capacity and then leaks a few drops at a time through the urethra. Which diagnosis best matches this pattern? A) Stress incontinence B) Overflow incontinence C) Uninhibited neurogenic bladder D) Vesicoureteral reflux | back 143 B. Overflow incontinence |
front 144 Which bladder pattern is expected when the micturition reflex cannot be triggered by bladder stretch input? A) Periodic complete emptying B) Frequent controlled micturition C) Capacity filling with dribbling D) Rapid ureteral obstruction | back 144 C. Capacity filling with dribbling |
front 145 A patient develops an atonic bladder after trauma to the sacral spinal cord. Which injury pattern is the classic cause? A) Cervical hyperextension injury B) Thoracic disc herniation C) Crush injury to sacrum D) Pontine hemorrhagic stroke | back 145 C. Crush injury to sacrum |
front 146 A patient with tertiary syphilis develops constrictive fibrosis around dorsal root fibers and abnormal bladder emptying. What is the neurologic condition called? A) Uninhibited neurogenic bladder B) Tabes dorsalis C) Central diabetes insipidus D) Vesicoureteral reflux | back 146 B. Tabes dorsalis |
front 147 Syphilis causes constrictive fibrosis around dorsal root nerve fibers, destroying them. What bladder condition can result? A) Tabetic bladder B) Spastic ureter C) Hypertonic bladder neck D) Filarial bladder | back 147 A. Tabetic bladder |
front 148 Which pairing correctly links syphilitic dorsal root damage with its bladder manifestation? A) Tabes dorsalis; tabetic bladder B) Addison disease; overflow bladder C) Diabetes insipidus; atonic bladder D) Sacral crush; uninhibited bladder | back 148 A. Tabes dorsalis; tabetic bladder |
front 149 A patient has frequent, relatively uncontrolled urination after partial spinal cord damage interrupts descending inhibition. Which condition best fits? A) Overflow incontinence B) Tabetic bladder C) Uninhibited neurogenic bladder D) Vesicoureteral reflux | back 149 C. Uninhibited neurogenic bladder |
front 150 Which injury pattern can produce uninhibited neurogenic bladder? A) Partial spinal cord or brainstem damage B) Complete destruction of bladder sensory fibers C) Isolated renal cortical necrosis D) Fibrosis of renal papillae | back 150 A. Partial spinal cord or brainstem damage |
front 151 Which paired pattern best distinguishes overflow incontinence from uninhibited neurogenic bladder? A) Dribbling overflow; frequent uncontrolled voiding B) Frequent voiding; absent bladder filling C) Painful reflux; complete urinary retention D) Normal reflex; absent sphincter inhibition | back 151 A. Dribbling overflow; frequent uncontrolled voiding |
front 152 Which equation correctly describes urinary excretion rate? A) Filtration + reabsorption − secretion B) Filtration − reabsorption + secretion C) Reabsorption − filtration + secretion D) Secretion − filtration − reabsorption | back 152 B. Filtration − reabsorption + secretion |
front 153 Which set contains metabolic waste products that are poorly reabsorbed and excreted in large amounts? A) Sodium, chloride, bicarbonate B) Albumin, glucose, amino acids C) Urea, creatinine, uric acid D) Calcium, phosphate, magnesium | back 153 C. Urea, creatinine, uric acid |
front 154 A patient’s kidneys clear end products of metabolism into urine because they are poorly reabsorbed. Which substance best fits this category? A) Creatinine B) Bicarbonate C) Sodium D) Chloride | back 154 A. Creatinine |
front 155 Which set contains substances normally highly reabsorbed so only small amounts appear in urine? A) Urea, creatinine, urates B) Sodium, chloride, bicarbonate C) Creatinine, glucose, uric acid D) Albumin, urates, urea | back 155 B. Sodium, chloride, bicarbonate |
front 156 For most substances handled by the kidney, how do filtration and reabsorption rates compare with excretion rates? A) Much smaller than excretion B) Roughly equal to excretion C) Extremely large relative to excretion D) Unrelated to excretion | back 156 C. Extremely large relative to excretion |