EXAM 3 PGY 451 551 F07

EXAM 3 PGY 451 551 - EXAM 3 PGY 451/551 Fall 2007 QUESTIONS 1 M DUFFEY 2 M DUFFEY 3 Use the diagram below to answer the following question 1 2 b I

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EXAM 3 PGY 451/551 Fall 2007 QUESTIONS 1: M DUFFEY 2. M DUFFEY 3: Use the diagram below to answer the following question In order for the bolus (b) to move from I to II along the GI tract, which of the following events have to occur together (simultaneously)? A. contraction of circular muscle at position 1 and relaxation of circular muscle at position 2 B. contraction of circular muscle at position 1 and contraction of circular muscle at position 2 C. relaxation of circular muscle at position 1 and contraction of circular muscle at position 2 D. relaxation of circular muscle at position 1 and relaxation of circular muscle at position 2 1/6 1 2 b I II
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4: Below is a diagram of four slow waves occurring in a gastrointestinal smooth muscle cell. Which slow wave, marked “A”, “B”, “C”, or “D,” should be accompanied by the most intense (or strongest) contraction of the cell? A. wave A B. wave B C. wave C D. wave D 5: Order the events of swallowing in the proper sequence from first to last. 1. Tongue moves bolus upward and backward toward pharynx 2. Primary peristalsis along esophagus 3. Lower esophageal sphincter relaxes 4. Upper esophageal sphincter relaxes 5. Epiglottis blocks larynx (windpipe) A. 1 → 5 → 4 → 2 → 3 B. 1 → 3 → 4 → 2 → 5 C. 1 → 2 → 4 → 3 → 5 D. 1 → 2 → 5 → 4 → 3 E. 1 → 5 → 3 → 4 → 2 6: Which of the following is NOT an example of propulsive activity in the gastrointestinal system? A. mastication (chewing) in the mouth B. peristalsis in the esophagus C. emptying of the stomach D. contraction of the gallbladder E. mass movement in the large intestine 2/6 A B C D Electric Threshold
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7: Which of the following is an example of CORRECT polarity (membrane location) of a transport process involved in secretion by the GI tract? A. enzyme-containing granules in the pancreatic acinar cells – basolateral membrane B. chloride channel in the pancreatic duct cell – basolateral membrane C. Na + - Cl - symporter in the intestinal crypt cell – luminal or apical membrane
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This note was uploaded on 11/10/2010 for the course PGY Phisiology taught by Professor Dr.beizer during the Spring '10 term at SUNY Buffalo.

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EXAM 3 PGY 451 551 - EXAM 3 PGY 451/551 Fall 2007 QUESTIONS 1 M DUFFEY 2 M DUFFEY 3 Use the diagram below to answer the following question 1 2 b I

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