Question 1

If pancreatic secretions were absent,

Accepted Answer

A)  there would be no bicarbonate to buffer the acid in chyme entering the duodenum. 
B)  mechanical digestion in the stomach would be inhibited. 
C)  the hormone secretin would not be secreted by the small intestine. 
D)  the gallbladder would not contract to release bile into the small intestine.

Question 2

An example of a problem caused by a sphincter muscle not operating properly is

Accepted Answer

A)  constipation. 
B)  gallbladder disease. 
C)  heartburn. 
D)  peptic ulcer.

Question 3

The layer of the gastrointestinal tract that contributes most to mechanical digestion of food is the

Accepted Answer

A)  mucosa. 
B)  submucosa. 
C)  muscularis. 
D)  serosa.

Question 4

Nutrients are considered to have become part of the body only once they have

Accepted Answer

A)  been placed inside the mouth. 
B)  been swallowed. 
C)  passed through the microvilli cells. 
D)  been stored throughout the body.

Question 5

If a meal is eaten at noon,by 8 PM that evening,the food would probably be in the

Accepted Answer

A)  stomach. 
B)  small intestine. 
C)  large intestine. 
D)  colon.

Question 6

When someone walks by a bakery and smells the fresh bread,his or her mouth starts to water.As the person thinks about eating the fresh bread,another digestive function that starts to occur is

Accepted Answer

A)  peristalsis in the small intestine. 
B)  stimulation of pancreatic secretions. 
C)  increased blood flow to the gut and liver. 
D)  release of the hormone gastrin in the stomach.

Question 7

Examples of mechanical digestion include

Accepted Answer

A)  activity of salivary amylase in the mouth. 
B)  churning and mixing of food in the stomach. 
C)  action of bile breaking fats into smaller droplets. 
D)  effects of secretin in stimulating the pancreas to release bicarbonate.

Question 8

Healing of a broken bone is an example of

Accepted Answer

A)  anabolism. 
B)  catabolism. 
C)  absorption. 
D)  metabolism.

Question 9

The action of salivary amylase in the mouth is an example of

Accepted Answer

A)  chemical digestion. 
B)  chewing. 
C)  mechanical digestion. 
D)  peristalsis and segmentation.

Question 10

The bloodstream carries nutrients to the liver soon after absorption because the liver

Accepted Answer

A)  produces hormones that regulate blood glucose level. 
B)  is an important site of metabolism and production of vital substances. 
C)  is able to determine which substances should be stored and eliminated. 
D)  has functions similar to those of the stomach in relation to the digestive process.

Exam 3: Digestion,Absorption,and Metabolism