Exam 16: A--The Digestive System

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Complete each of the following statments. In general, the parasympathetic nervous system is ____________________ (excitatory or inhibitory) to the digestive tract, whereas the sympathetic nervous system is ____________________.

(Short Answer)
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Which of the following factors will not influence the rate at which a meal will empty from the stomach?

(Multiple Choice)
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Bilirubin aids fat digestion and absorption.

(True/False)
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The chief cells of the gastric mucosa secrete

(Multiple Choice)
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Which of the following substances is absorbed by the stomach?

(Multiple Choice)
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The ultimate source of the fluids secreted into the digestive tract is the plasma.

(True/False)
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Lipase breaks down proteins via hydrolysis.

(True/False)
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Hormones acting in the small intestine include

(Multiple Choice)
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Peristaltic waves occur continuously in the stomach at a rate of three contractions per minute, keeping pace with the BER.

(True/False)
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Gastric mixing

(Multiple Choice)
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Excessive small intestinal motility can lead to constipation because there is less time for absorption to take place.

(True/False)
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The hormone secretin is released by endocrine cells in the duodenal mucosa in response to

(Multiple Choice)
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During defecation, the internal anal sphincter relaxes.

(True/False)
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Digestive motility

(Multiple Choice)
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In cirrhosis, damaged hepatocytes are permanently replaced by an overgrowth of connective tissue.

(True/False)
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Parasympathetic stimulation of the salivary glands produces a large volume of watery saliva high in enzyme concentration.

(True/False)
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Swallowing propels a bolus of food from the mouth through the pharynx and esophagus into the stomach via a complex, sequential, multiple-response reflex.

(True/False)
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Symptoms associated with constipation are attributable to toxins absorbed from the retained fecal material.

(True/False)
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The serosa is the

(Multiple Choice)
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Colonic secretion contains no digestive enzymes.

(True/False)
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