Chapter 35: Gastrointestinal Function

Chapter 35: Gastrointestinal Function

Complete Chapter Questions With Answers

Sample Questions Are Posted Below

MULTIPLE CHOICE

1. The structure and secretions of the salivary gland most closely resemble those of the

ANS:  B

The salivary gland and the pancreas both secrete amylase. Gastric glands secrete pepsinogen. The liver and salivary gland do not resemble each other in the secretory process. The gallbladder secretes concentrated bile salts.

REF:   Pg. 712

2. The primary stimulus for pancreatic secretion is

ANS:  D

Secretin, which is produced by the mucosa of the duodenum in response to the entry of acidic gastric juice from the stomach, stimulates pancreatic fluid. Gastrin is secreted by endocrine cells of the stomach mucosa in response to food entry. Histamine is not the primary stimulus for pancreatic secretion. Acetylcholine is not associated with the secretion of pancreatic fluids.

REF:   Pg. 705

3. The action of bile is to

ANS:  A

Bile is produced continuously in the liver and is responsible for emulsifying fats. Humans do not secrete an enzyme capable of digesting cellulose. Sucrase converts sucrose to glucose and fructose. Protein digestion involves the release of free amino acids.

REF:   Pg. 711

4. The sympathetic nerve endings in the GI tract secrete

ANS:  D

The sympathetic nerve endings in the GI tract secrete norepinephrine, which promotes the inhibitory effect of the sympathetic nervous system on the GI tract. Acetylcholine is not secreted by sympathetic nerve endings in the GI tract. Histamine stimulates parietal cell secretion. Gastrin is not secreted by sympathetic nerve endings in the GI tract.

REF:   Pg. 705