1 A) is a layer of muscle tissue. B) is composed of connective tissue. C) is the innermost tissue layer of the gut. D) contains an epithelial lining. E) both b and c 2 A) an omnivore. B) a carnivore. C) a herbivore. D) a ruminant. E) none of the above 3 A) to activate pepsinogen to become pepsin. B) to kill most bacteria. C) to help denature food proteins. D) to provide the optimal pH for pepsin. E) all of the above 4 A) emulsify fats. B) are waste products from the liver. C) are stored and concentrated in the gallbladder. D) complete the breakdown of proteins. E) both b and c 5 A) is longer than the small intestine. B) has villi and microvilli. C) completes the digestive process. D) absorbs water, electrolytes and products of bacterial metabolism. E) all of the above 6 A) occurs in carnivores. B) occurs in nonruminant herbivores. C) occurs in ruminant herbivores. D) is the eating of feces. E) both b and d 7 A) cholecystokinin, secretin, B) cholecystokinin, secretin, gastric inhibitory peptide C) gastrin, secretin, D) cholecystokinin, secretin, gastrin E) chymotripsin, secretin, gastric inhibitory peptide 8 A) There is decreased insulin and glucagon production. B) There is increased glucagon production. C) Glycogen is hydrolyzed by the liver and glucose is released into the blood. D) There is increased insulin production. E) both b and c 9 A) a mutant, non-functional form of leptin is present B) lack of leptin receptors in adipose cells C) reduced sensitivity to leptin in the brain D) none of the above
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