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Acid, base, salt, and water balance

front 1 Which cells of the kidney are the most important for regulation of pH of body fluids? a. Intercalated cells b. Principal cells c. DCT cells d. Glomerular podocytes e. PCT cells f. podocytes g. macula densa cells	back 1 a. Intercalated cells
front 2 Which protein is the main protein buffer in blood plasma? a. Calmodulin b. Fibrin c. Hemoglobin d. Complement e. Albumin	back 2 e. Albumin
front 3 An illness causes Doug to experience severe diarrhea and an accompanying loss of bicarbonate-rich secretions. How can this metabolic acidosis be compensated? a. vasoconstriction b. hypoventilation c.increased respiratory rate and depth d.enhanced sodium ion loss in urine e. increased renin secretion	back 3 c.increased respiratory rate and depth
front 4 Insufficient parathyroid hormone production in the body could result in ________. a.kidney stones b.muscle twitching c. diarrhea d.muscle weakness e.cardiac arrhythmia	back 4 b.muscle twitching

front 5 Mary finds that she regularly retains water at a certain point in the menstrual cycle. Which of the following is chemically similar to aldosterone, and like aldosterone, enhances NaCl reabsorption in the renal tubules? a. luteinizing hormone b. follicle-stimulating hormone c. testosterone d. progesterone e. estrogen	back 5 e. estrogen
front 6 What part of the brain is considered to be the thirst center? a. Brain stem b. Cerebrum c. Midbrain d. Hypothalamus e. Thalamus	back 6 d. Hypothalamus
front 7 Which of the following is a common cause of respiratory acidosis? a. Loss of bicarbonate ions due to renal dysfunction b. Loss of acid due to vomiting c. Hyperventilation due to pulmonary disease d. Hypoventilation due to emphysema e. All of these are correct f. none of these are correct	back 7 d. Hypoventilation due to emphysema
front 8 Which of the following chemicals is considered to be a volatile acid? a. bicarbonate b. Calmodulin c. Carbon dioxide d. Carbonic acid e. Oxygen f. Hemoglobin	back 8 d. Carbonic acid

front 9 Which of the following is the most common cause of metabolic alkalosis? a. hypertension b. Cancer c. Pneumothroax d. Vomiting e. Hemorrhage f. Diabetes	back 9 d. Vomiting
front 10 The regulation of potassium balance ________. a. is not linked to sodium balance b. involves aldosterone-induced secretion of potassium c. is accomplished mainly by hepatic mechanisms d. includes renal secretion, but never absorption	back 10 b. involves aldosterone-induced secretion of potassium
front 11 Inadequate exhalation of carbon dioxide can cause a. Respiratory compensation b. Blood pH to drop c. Metabolic alkalosis d. Alkalosis e. Unequal distribution of water	back 11 b. Blood pH to drop
front 12 In partial compensation a. pH is greater than 5.5 b. pH is brought into the normal range c. pH is lower than 2.5 d. systemic arterial blood is higher than 9.5 e. systemic arterial blood is still lower than 7.35	back 12 e. systemic arterial blood is still lower than 7.35

front 13 Metabolic reactions can produce a. Nonvolatile acids b. Ca⁺ c. HCO₃ ^- d. Volatile bases e. H⁺	back 13 a. Nonvolatile acids
front 14 Most of the phosphate in a body is present as a. Carbohydrates b. Plasma membranes c. Lipids d. Calcium phosphate salt e. DNA	back 14 d. Calcium phosphate salt
front 15 The Na⁺ level in blood is controlled by a. potassium b. ATP production c. Glucagon d. Aldosterone e. Insulin f. Krebs cycle g. rennin	back 15 d. Aldosterone
front 16 Annie has just eaten a large order of heavily salted French fries, some pickled eggs, and some cheese. How will consuming this much salt affect her physiology? a.It will cause a prolonged increase in the osmolality of the blood. b.There will be a temporary increase in blood volume. c.She will experience hypotension. d. There will be a shift in the pH of her body fluids to the higher side of the pH scale.	back 16 b.There will be a temporary increase in blood volume.

front 17 In intracellular fluid the most abundant cation is: a. Cl ^- b. HCO₃ ^- c. HPO₄ ^2- d. K⁺ e. Na⁺	back 17 d. K⁺
front 18 In intracellular fluid the most abundant anion is a. HPO₄ ^2- b. Cl ^- c. Na⁺ d. HCO₃ ^- e. K⁺	back 18 a. HPO₄ ^2-
front 19 A decline in angiotensin II levels does NOT result in a. Increased GFR b. Increased Calcium reabsorption c. Reduced water reabsorption by the kidneys d. Reduced Na⁺ and Cl ^- reabsorption by the kidneys e. Increased urine output	back 19 e. Increased urine output
front 20 Blood analysis indicates a low pH, and the patient is breathing rapidly. Given your knowledge of acid-base balance, which of the following is most likely? a. respiratory acidosis b.metabolic acidosis c.metabolic alkalosis d.respiratory alkalosis e. none of the choicesf. all of the choices	back 20 b.metabolic acidosis

front 21 Which of the following is NOT a disorder of water balance? a. hypotonic hydration, in which sodium content is normal but water content is high b.edema or tissue swelling, which is usually due to an increased capillary hydrostatic pressure c.excessive hydration due to excess atrial natriuretic peptide (ANP) secretion d.excess water in interstitial spaces due to a low level of plasma proteins	back 21 c.excessive hydration due to excess atrial natriuretic peptide (ANP) secretion
front 22 Which of the following statements is true regarding fluid shifts? a.Electrolytes are not as important as proteins in regulating fluid shifts in the body. b.Electrolytes have greater osmotic power than nonelectrolytes and therefore have the greatest ability to cause fluid shifts. c.Nonelectrolytes are the controlling factor in directing fluid shifts. d.There are always more positive electrolytes than negative in a solution; it is therefore impossible to follow fluid shifts.	back 22 b.Electrolytes have greater osmotic power than nonelectrolytes and therefore have the greatest ability to cause fluid shifts.
front 23 Which of the following is NOT a chemical buffer system? a. bicarbonate b. phosphate c. protein d. nucleic acid	back 23 d. nucleic acid
front 24 What hormone reduces blood pressure and blood volume by inhibiting nearly all events that promote vasoconstriction and sodium ion and water retention? a. thyroxine b. renin c.antidiuretic hormone (ADH) d. aldosterone e.atrial natriuretic peptide (ANP)	back 24 e.atrial natriuretic peptide (ANP)