MCDB 111 Su 2017 Section quiz 5B Key 9/7/17 Mark the best answer to each question on your scantron form. Make sure your name, perm, date, and MCDB 111 Summer quiz 5 appears on the answer form. Each correct answer is worth half a point. 1. The cephalic phase of stomach digestion is an example of a a. negative feedback system b. positive feedback system c. negative feedforward system d. positive feedforward system e. non-regulated system 2. Which of the following contributes to the countercurrent multiplier of the nephron? a. Sodium is actively transported from the ascending limb of the Loop of Henle into the interstitium b. Water is transported into the interstitium from the ascending limb of the Loop of Henle c. Water is transported from the interstitium into the descending limb of the loop of Henle d. Water is transported from the interstitium into the ascending limb of the Loop of Henle e. Sodium is actively transported from the descending limb of the Loop of Henle into the interstitium 3. The enteric nervous system a. receives input from the sympathetic but not the parasympathetic NS b. receives input from the parasympathetic NS but not the sympathetic NS c. is associated only with the small intestine d is restricted to the myenteric plexus layer of the gastrointestinal tract e. has only excitatory actions on smooth muscle 4. Which of these inhibits the secretion of H+ into the stomach? a. Gastrin b. Histamine c. Stomatastatin d. Acetylcholine e. Norepinephrine 5. Which of the following types of drugs would reduce the loss of K+ in the urine? a. A drug that enhances the release of secretin b. An angiotensin II converting enzyme inhibitor c. A drug that blocks the binding of aldosterone to aldosterone receptors d. A Na+ K+ ATPase inhibitor e. b, c, and d 6. Which of the following mechanisms is not used by the kidney to regulate interstitial fluid pH a. Conversion of a-keto acids into amino acids b. Secretion of bicarbonate ion into the tubular lumen c. Production of new bicarbonate ion from glutamine d. Synthesis of additional bicarbonate ion in tubular cells by carbonic anhydrase e. Neither a nor b7. Secretin a. promotes secretion of H+ by stomach parietal cells b. promotes release of pepsinogen by chief cells in the stomach c. promotes release of amylase from salivary glands d. inhibits H+ secretion into the stomach lumen e. promotes the secretion of lipase from the pancreas 8. The movement of material through the small intestine is (relative to the movement of food through the stomach) is a. faster and promoted by contraction of circular smooth muscle b. slower and promoted by contraction of longitudinal smooth muscle c. the same rate and promoted by contraction of longitudinal smooth muscle d. slower and promoted by contraction of circular smooth muscle e. faster and promoted by contraction of skeletal muscle 9. The release of bile into the small intestine a. occurs on a continuous basis without any regulation b. is induced by cholecystokinin c. involves enteric nervous system induced contraction of the sphincter of Oddi d. is inhibited by gastrin e. is required for digestion of carbohydrates 10. Which of the following is a reasonable conclusion of the two studies of salivary amylase secretion? a. There is no correlation between the amount of salivary amylase and diet b. Events that give rise to increased production of salivary amylase can occur independent of diet c. Increased production of salivary amylase can be induced by changes in diet d. Consumption of protein suppresses the production of salivary amylase e. Both b and
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