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human physiology study questions 33

human physiology study questions 33 - the secretion of HCl...

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4/21/08 Lecture 33: Digestion and Absorption of Food II (Ch. 15) Study Questions 1. Which of the following statements are correct ? A. Chewing food is essential for digestion because it will alter the rate at which food is digested and absorbed. B. Salivary secretion is increased by sympathetic stimulation and decreased by parasympathetic stimulation. C. When swallowing food, efferent fibers running from the swallowing center to the respiratory muscles will inhibit respiration. D. The passage of food down the esophagus to the stomach is a passive process primarily due to gravity. E. Both A and D are correct. 2. Which of the following statements about the stomach are not correct ? A. The antrum is the thick, muscular portion where most of the mixing of stomach contents occurs. B. The body is the only portion of the stomach that contains glands capable of secretion. C. During a meal, an increase in parasympathetic activity to the stomach will increase
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Unformatted text preview: the secretion of HCl. D. A hypertonic solution in the duodenum can inhibit gastric emptying. E. All of the statements are correct 3. What can be expected to occur after eating a large, high fat meal? A. Cholecystokinin will be secreted from the stomach and stimulate pancreatic enzyme release to aid in digestion. B. Absorption of bile salts from the intestine will increase their plasma concentration and inhibit the secretion of bile from the liver and lead to increased bile storage in the gallbladder. C. Cholecystokinin secretion will result in the sphincter of Oddi relaxing allowing increased storage of bile in the gallbladder. D. The small intestine will release secretin, which stimulates the pancreas to release bicarbonate to buffer the increases in stomach acid released following a meal. E. Statements B and C are both correct. Answers: 1) C; 2) B; 3) D...
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