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A&P 2 Final part 1

front 1

What is the function of the juxtaglomerular apparatus?

A) help regulate blood pressure and the rate of blood filtration by the kidneys

B) help regulate blood pressure and the rate of excretion by the kidneys

C) help regulate urea absorption by the kidneys

D) help regulate water and electrolyte excretion by the kidneys

back 1

A) help regulate blood pressure and the rate of blood filtration by the kidneys

front 2

Urine passes through the ________.
A) renal hilum to the bladder to the ureter
B) pelvis of the kidney to ureter to bladder to urethra
C) glomerulus to ureter to renal tubule
D) hilum to urethra to bladder

back 2

B) pelvis of the kidney to ureter to bladder to urethra

front 3

Which of the following is not associated with the renal corpuscle?
A) a podocyte
B) a vasa recta
C) a fenestrated capillary
D) an efferent arteriole

back 3

B) a vasa recta

front 4

An increase in the permeability of the cells of the collecting tubule to water is due to a(n) ________.

A) decrease in the production of ADH

B) increase in the production of ADH

C) increase in the production of aldosterone

D) decrease in the concentration of the blood plasma

back 4

B) increase in the production of ADH

front 5

Select the correct statement about factors that influence blood pressure.

A) An increase in cardiac output corresponds to a decrease in blood pressure, due to the increased delivery.

B) Systemic vasodilation would increase blood pressure, due to diversion of blood to essential areas.

C) Excess protein production would decrease blood pressure.

D) Excess red cell production would cause a blood pressure increase.

back 5

D) Excess red cell production would cause a blood pressure increase

front 6

The kidneys are stimulated to produce renin ________.

A) when the peritubular capillaries are dilated

B) when the pH of the urine decreases

C) by a decrease in the blood pressure

D) when the specific gravity of urine rises above 1.10

back 6

C) by a decrease in the blood pressure

front 7

Which of the choices below is not a function of the urinary system?
A) helps maintain homeostasis by controlling the composition, volume, and pressure of blood
B) regulates blood glucose levels and produces hormones
C) maintains blood osmolarity
D) eliminates solid, undigested wastes and excretes carbon dioxide, water, salts, and heat

back 7

D) eliminates solid, undigested wastes and excretes carbon dioxide, water, salts, and heat

front 8

The descending limb of the loop of Henle ________.

A) is not permeable to water

B) is freely permeable to sodium and urea

C) pulls water by osmosis into the lumen of the tubule

D) contains fluid that becomes more concentrated as it moves down into the medulla

back 8

D) contains fluid that becomes more concentrated as it moves down into the medulla

front 9

The ________ artery lies on the boundary between the cortex and medulla of the kidney.
A) lobar
B) arcuate
C) interlobar
D) cortical radiate

back 9

B) arcuate

front 10

The glomerulus differs from other capillaries in the body in that it ________.
A) has a basement membrane
B) is impermeable to most substances
C) is drained by an efferent arteriole
D) has a blood pressure much lower than other organ systems

back 10

C) is drained by an efferent arteriole

front 11

The descending limb of the loop of Henle ________.

A) is not permeable to water
B) is freely permeable to sodium and urea
C) pulls water by osmosis into the lumen of the tubule
D) contains fluid that becomes more concentrated as it moves down into the medulla

back 11

D) contains fluid that becomes more concentrated as it moves down into the medulla

front 12

The fatty tissue surrounding the kidneys is important because it ________.

A) ensures adequate energy for the adrenal glands to operate efficiently
B) stabilizes the position of the kidneys by holding them in their normal position
C) is necessary as a barrier between the adrenal glands and kidneys
D) produces vitamin D

back 12

B) stabilizes the position of the kidneys by holding them in their normal position

front 13

Select the correct statement about factors that influence blood pressure.

A) An increase in cardiac output corresponds to a decrease in blood pressure, due to the increased delivery.

B) Systemic vasodilation would increase blood pressure, due to diversion of blood to essential areas.

C) Excess protein production would decrease blood pressure.

D) Excess red cell production would cause a blood pressure increase.

back 13

D) Excess red cell production would cause a blood pressure increase

front 14

The functional and structural unit of the kidneys is the ________.
A) nephron
B) loop of Henle
C) glomerular capsule
D) basement membrane of the capillaries

back 14

A) nephron

front 15

The juxtaglomerular apparatus is responsible for ________.

A) the secretion of drugs
B) the secretion of acids and ammonia
C) reabsorption of organic molecules, vitamins, and water
D) regulating the rate of filtrate formation and controlling systemic blood pressure

back 15

D) regulating the rate of filtrate formation and controlling systemic blood pressure

front 16

The chief force pushing water and solutes out of the blood across the filtration membrane is ________.

A) the design and size of the podocytes
B) the thickness of the capillary endothelium
C) glomerular hydrostatic pressure (glomerular blood pressure)
D) the size of the pores in the basement membrane of the capillaries

back 16

C) glomerular hydrostatic pressure (glomerular blood pressure)

front 17

Which of the following acts as the trigger for the initiation of micturition (voiding)?

A) the stretching of the bladder wall
B) motor neurons
C) the pressure of the fluid in the bladder
D) the sympathetic efferents

back 17

A) the stretching of the bladder wall

front 18

The filtration membrane includes all except ________.

A) glomerular endothelium
B) podocytes
C) renal fascia
D) basement membrane

back 18

C) renal fascia

front 19

Most electrolyte reabsorption by the renal tubules is ________.

A) not Tm limited
B) in the distal convoluted tubule
C) hormonally controlled in distal tubule segments
D) completed by the time the loop of Henle is reached

back 19

C) hormonally controlled in distal tubule segments

front 20

The macula densa cells respond to ________.
A) aldosterone
B) antidiuretic hormone
C) changes in pressure in the tubule
D) changes in solute content of the filtrate

back 20

D) changes in solute content of the filtrate

front 21

Which of the following is not reabsorbed by the proximal convoluted tubule?
A) Na+
B) K+
C) glucose
D) creatinine

back 21

D) creatinine

front 22

The fluid in the glomerular (Bowman's) capsule is similar to plasma except that it does not contain a significant amount of ________.
A) glucose
B) hormones
C) electrolytes
D) plasma protein

back 22

D) plasma protein

front 23

The function of angiotensin II is to ________.
A) constrict arterioles and increase blood pressure
B) decrease the production of aldosterone
C) decrease arterial blood pressure
D) decrease water absorption

back 23

A) constrict arterioles and increase blood pressure

front 24

Place the following in correct sequence from the formation of a drop of urine to its elimination from the body.

1. major calyx
2. minor calyx
3. nephron
4. urethra
5. ureter
6. collecting duct

A) 3, 1, 2, 6, 5, 4
B) 6, 3, 2, 1, 5, 4
C) 2, 1, 3, 6, 5, 4
D) 3, 6, 2, 1, 5, 4

back 24

D) 3, 6, 2, 1, 5, 4

front 25

What would happen if the capsular hydrostatic pressure were increased above normal?

A) Net filtration would increase above normal.
B) Net filtration would decrease.
C) Filtration would increase in proportion to the increase in capsular pressure.
D) Capsular osmotic pressure would compensate so that filtration would not change.

back 25

B) Net filtration would decrease.

front 26

Which of the following is not a part of the juxtaglomerular apparatus?
A) granular cells
B) macula densa
C) podocyte cells
D) mesangial cells

back 26

C) podocyte cells

front 27

Which of the choices below is a function of the loop of Henle?
A) form a large volume of very concentrated urine or a small volume of very dilute urine
B) form a large volume of very dilute urine or a small volume of very concentrated urine
C) absorb electrolytes actively with an automatic absorption of water by osmosis
D) none of these

back 27

B) form a large volume of very dilute urine or a small volume of very concentrated urine

front 28

The factor favoring filtrate formation at the glomerulus is the ________.
A) colloid osmotic pressure of the blood
B) glomerular hydrostatic pressure
C) capsular hydrostatic pressure
D) myogenic mechanism

back 28

B) glomerular hydrostatic pressure

front 29

If one says that the clearance value of glucose is zero, what does this mean?
A) The glucose molecule is too large to be filtered out of the blood.
B) Most of the glucose is filtered out of the blood and is not reabsorbed in the convoluted tubules.
C) Normally all the glucose is reabsorbed.
D) The clearance value of glucose is relatively high in a healthy adult.

back 29

C) Normally all the glucose is reabsorbed.

front 30

Excretion of dilute urine requires ________.
A) relative permeability of the distal tubule to water
B) impermeability of the collecting tubule to water
C) transport of sodium and chloride ions out of the descending loop of Henle
D) the presence of ADH

back 30

B) impermeability of the collecting tubule to water

front 31

In the ascending limb of the loop of Henle the ________.

A) thin segment is freely permeable to water

B) thick segment is permeable to water

C) thin segment is not permeable to sodium and chloride

D) thick segment moves ions out into interstitial spaces for reabsorption

back 31

D) thick segment moves ions out into interstitial spaces for reabsorption

front 32

Which of the choices below does not describe the importance of tubular secretion?
A) disposing of substances not already in the filtrate, such as certain drugs
B) eliminating undesirable substances such as urea and uric acid that have been reabsorbed by passive processes
C) ridding the body of bicarbonate ions
D) ridding the body of excessive potassium ions

back 32

C) ridding the body of bicarbonate ions

front 33

Which statement is correct?
A) Reabsorption of water is hormonally controlled.
B) Normal filtrate contains a large amount of protein.
C) Most of the water passing through the kidney is eliminated as urine.
D) The excretion of sodium ions is one of the mechanisms that maintains the pH balance of the blood.

back 33

A) Reabsorption of water is hormonally controlled.

front 34

What is the function of the juxtaglomerular apparatus?
A) help regulate blood pressure and the rate of blood filtration by the kidneys
B) help regulate blood pressure and the rate of excretion by the kidneys
C) help regulate urea absorption by the kidneys
D) help regulate water and electrolyte excretion by the kidneys

back 34

A) help regulate blood pressure and the rate of blood filtration by the kidneys

front 35

Which of the choices below is the salt level-monitoring part of the nephron?
A) macula densa
B) principal cell
C) vasa recta
D) loop of Henle

back 35

A) macula densa

front 36

Which of the hormones below is responsible for facultative water reabsorption?
A) ADH
B) thyroxine
C) aldosterone
D) atrial natriuretic peptide

back 36

A) ADH

front 37

Which of the choices below is not a glomerular filtration rate control method?
A) renal autoregulation
B) neural regulation
C) electrolyte levels
D) hormonal regulation

back 37

C) electrolyte levels

front 38

Which cells of the kidney are chemoreceptors that respond to changes in solute content of the filtrate?
A) juxtaglomerular cells
B) mesangial cells
C) macula densa cells
D) podocytes

back 38

C) macula densa cells

front 39

What is the average normal pH of blood?

A) 8.4
B) 7.8
C) 7.4
D) 4.7

back 39

C) 7.4

front 40

Which blood type is called the universal donor?

A) A
B) B
C) AB
D) O

back 40

D) O

front 41

Which of the following is a regulatory function of blood?

A) delivery of oxygen to body cells
B) transport of metabolic wastes from cells
C) prevention of blood loss
D) maintenance of normal pH in body tissues

back 41

D) maintenance of normal pH in body tissues

front 42

Which of the following is a protective function of blood?

A) prevention of blood loss
B) maintenance of adequate fluid volume
C) maintenance of normal pH in body tissue
D) maintenance of body temperature

back 42

D) maintenance of body temperature

front 43

Which of the following might trigger erythropoiesis?

A) hypoxia of EPO-producing cells
B) decreased tissue demand for oxygen
C) an increased number of RBCs
D) moving to a lower altitude

back 43

A) hypoxia of EPO-producing cells

front 44

As red blood cells age ________.

A) ATP production increases
B) membranes ʺwear outʺ and the cells become damaged
C) they will eventually be excreted by the digestive system
D) iron will be excreted by the kidneys

back 44

B) membranes ʺwear outʺ and the cells become damaged

front 45

The most abundant plasma protein is ________.

A) globulin
B) clotting protein
C) albumin
D) bile

back 45

C) albumin

front 46

When neither anti-A nor anti-B clots on a blood plate, the blood is type ________.

A) A
B) B
C) AB
D) O

back 46

D) O

front 47

Which of these is not a normal plasma protein?

A) fibrinogen
B) gamma globulin
C) thromboplastin
D) albumin

back 47

C) thromboplastin

front 48

No visible cytoplasmic granules are present in ________.

A) monocytes
B) basophils
C) eosinophils
D) neutrophils

back 48

A) monocytes

front 49

Place the following in correct developmental sequence:

1. reticulocyte
2. proerythroblast
3. normoblast
4. late erythroblast

A) 1, 2, 3, 4
B) 1, 3, 2, 4
C) 2, 1, 3, 4
D) 2, 4, 3, 1

back 49

D) 2, 4, 3, 1

front 50

Which of the following is not a cause of bleeding disorders?

A) thrombocytopenia, a condition of decreased circulating platelets
B) excess secretion of platelet-derived growth factor (PDGF)
C) a defect in the clotting cascade
D) vitamin K deficiency

back 50

B) excess secretion of platelet-derived growth factor (PDGF)

front 51

Which of the following is characteristic of all leukocytes?

A) They are nucleated.
B) They have cytoplasmic granules.
C) They are phagocytic.
D) They are the most numerous of the formed elements in blood

back 51

A) They are nucleated.

front 52

Which of the following is true about blood plasma?

A) It is the same as serum but without the clotting proteins.
B) The main protein component is hemoglobin.
C) It is about 90% water.
D) It contains about 20 dissolved components.

back 52

C) It is about 90% water.

front 53

Platelets ________.

A) stick to the damaged area of a blood vessel and help seal the break
B) have a life span of about 120 days
C) are the precursors of leukocytes
D) have multiple nuclei

back 53

A) stick to the damaged area of a blood vessel and help seal the break

front 54

All of the following conditions impair coagulation except ________.

A) vascular spasm
B) vitamin K deficiency
C) severe hypocalcemia
D) liver disease

back 54

A) vascular spasm

front 55

What organ in the body regulates erythrocyte production?

A) Kidney
B) Brain
C) Liver
D) Pancreas

back 55

A) Kidney

front 56

which of the choices below is the parent cell for all formed elements of blood?

A) pluripotent stem cell (hemocytoblast)
B) polymorphonuclear cell
C) NK cell
D) megakaryocyte

back 56

A) pluripotent stem cell (hemocytoblast)

front 57

Which of the following is not a phase of hemostasis?

A) fibrinolysis
B) coagulation
C) platelet plug formation
D) cascular spasm

back 57

A) fibrinolysis

front 58

What is the average normal pH range for blood?

A) 7.35 - 7.45
B) 8.35 - 8.45
C) 4.65 - 4.75
D) 7.75 - 7.85

back 58

A) 7.35 - 7.45

front 59

Which of the following is likely during vigorous exercise?

A) capillaries of the active muscles will be engorged with blood
B) Blood flow to the kidneys increases
C) the skin will be cold and clammy
D) blood will be diverted to the digestive organs

back 59

A) capillaries of the active muscles will be engorged with blood

front 60

Which of the following is true about veins?
A) Venous valves are formed from the tunica media.
B) Up to 35% of total body blood is in venous circulation at any given time.
C) Veins have a small lumen in relation to the thickness of the vessel wall.
D) Veins are called capacitance vessels or blood reservoirs.

back 60

D) Veins are called capacitance vessels or blood reservoirs.

front 61

Peripheral resistance ________.
A) decreases with increasing length of the blood vessel
B) increases as blood vessel diameter increases
C) increases as blood viscosity increases
D) is not a major factor in blood pressure in healthy individuals

back 61

C) increases as blood viscosity increases

front 62

Blood flow to the skin ________.

A) is controlled mainly by decreasing pH
B) increases when environmental temperature rises
C) increases when body temperature drops so that the skin does not freeze
D) is not an important source of nutrients and oxygen for skin cells

back 62

B) increases when environmental temperature rises

front 63

Which tunic of an artery contains endothelium?
A) tunica intima
B) tunica media
C) tunica externa
D) basement membrane

back 63

A) tunica intima

front 64

Which tunic of an artery is most responsible for maintaining blood pressure and continuous blood circulation?
A) tunica intima
B) tunica media
C) tunica externa
D) basement membrane

back 64

B) tunica media

front 65

The hepatic portal vein ________.
A) is actually an artery
B) carries nutrient-rich blood to the liver
C) carries oxygen-rich blood from the liver to the viscera
D) carries blood from the liver to the inferior vena cava

back 65

B) carries nutrient-rich blood to the liver

front 66

Which statement is correct?

A) Reabsorption of water is hormonally controlled.
B) Normal filtrate contains a large amount of protein.
C) Most of the water passing through the kidney is eliminated as urine.
D) The excretion of sodium ions is one of the mechanisms that maintains the pH balance of the blood.

back 66

A) Reabsorption of water is hormonally controlled.

front 67

The arteries that directly feed into the capillary beds are called ________.
A) muscular arteries
B) elastic arteries
C) arterioles
D) venules

back 67

C) arterioles

front 68

Factors that aid venous return include all except ________.
A) activity of skeletal muscles
B) pressure changes in the thorax
C) venous valves
D) urinary output

back 68

D) urinary output

front 69

Select the correct statement about factors that influence blood pressure.

A) An increase in cardiac output corresponds to a decrease in blood pressure, due to the increased delivery.

B) Systemic vasodilation would increase blood pressure, due to diversion of blood to essential areas.

C) Excess protein production would decrease blood pressure.

D) Excess red cell production would cause a blood pressure increase.

back 69

D) Excess red cell production would cause a blood pressure increase

front 70

Which of the choices below does not describe the importance of tubular secretion?

A) disposing of substances not already in the filtrate, such as certain drugs

B) eliminating undesirable substances such as urea and uric acid that have been reabsorbed by passive processes

C) ridding the body of bicarbonate ions

D) ridding the body of excessive potassium ions

back 70

C) ridding the body of bicarbonate ions

front 71

All of the following conditions impair coagulation except ________.

A) vascular spasm
B) vitamin K deficiency
C) severe hypocalcemia
D) liver disease

back 71

A) vascular spasm

front 72

Which statement best describes arteries?
A) All carry oxygenated blood to the heart.
B) All carry blood away from the heart.
C) All contain valves to prevent the backflow of blood.
D) Only large arteries are lined with endothelium.

back 72

B) All carry blood away from the heart.

front 73

Permitting the exchange of nutrients and gases between the blood and tissue cells is the primary function of ________.
A) arterioles
B) arteries
C) veins
D) capillaries

back 73

D) capillaries

front 74

The arteries that are also called muscular arteries are the ________.
A) capillaries
B) distributing arteries
C) elastic arteries
D) arterioles

back 74

B) distributing arteries

front 75

Aldosterone will _______.
A) promote a decrease in blood volume
B) decrease sodium reabsorption
C) promote an increase in blood pressure
D) result in a larger output of urine

back 75

C) promote an increase in blood pressure

front 76

The pulse pressure is ________.
A) systolic pressure plus diastolic pressure
B) systolic pressure minus diastolic pressure
C) systolic pressure divided by diastolic pressure
D) diastolic pressure plus 1/3 (systolic pressure plus diastolic pressure)

back 76

B) systolic pressure minus diastolic pressure

front 77

Select the correct statement about cardiac output.

A) A slow heart rate increases end diastolic volume, stroke volume, and force of contraction.

B) Decreased venous return will result in increased end diastolic volume.

C) If a semilunar valve were partially obstructed, the end systolic volume in the affected ventricle would be decreased.

D) Stroke volume increases if end diastolic volume decreases.

back 77

A) A slow heart rate increases end diastolic volume, stroke volume, and force of contraction.

front 78

Isovolumetric contraction ________.

A) refers to the short period during ventricular systole when the ventricles are completely closed chambers
B) occurs while the AV valves are open
C) occurs immediately after the aortic and pulmonary valves close
D) occurs only in people with heart valve defects

back 78

A) refers to the short period during ventricular systole when the ventricles are completely closed chambers

front 79

Normal heart sounds are caused by which of the following events?

A) excitation of the SA node
B) closure of the heart valves
C) friction of blood against the chamber walls
D) opening and closing of the heart valves

back 79

B) closure of the heart valves

front 80

When viewing a dissected heart, it is easy to visually discern the right and left ventricles by ________.

A) tracing out where the auricles connect
B) noticing the thickness of the ventricle walls
C) locating the apex
D) finding the papillary muscles

back 80

B) noticing the thickness of the ventricle walls

front 81

Which vessel of the heart receives blood during right ventricular systole?

A) venae cavae
B) pulmonary trunk
C) aorta
D) pulmonary veins

back 81

B) pulmonary trunk

front 82

Which of the following is not part of the conduction system of the heart?

A) AV node
B) bundle of His
C) AV valve
D) SA node

back 82

C) AV valve