Question 1

The _______ is the innermost tissue layer of the gut. It is a secretory and absorptive surface.

Accepted Answer

A)  mucosa 
B)  submucosa 
C)  smooth muscle 
D)  nervous tissue 
E)  connective tissue 
A)  mucosa 
B)  submucosa 
C)  smooth muscle 
D)  nervous tissue 
E)  connective tissue

Question 2

If a person drinks a sugar-containing soda, a significant amount of glucose is released into the blood stream. This will cause the pancreas to release

Accepted Answer

A)  glucagon. 
B)  somatostatin. 
C)  insulin. 
D)  testosterone. 
E)  estrogen. 
A)  glucagon. 
B)  somatostatin. 
C)  insulin. 
D)  testosterone. 
E)  estrogen.

Question 3

Organisms that derive their energy and molecular nutrients from other organisms are called

Accepted Answer

A)  autotrophs. 
B)  herbivores. 
C)  heterotrophs. 
D)  photosynthetic. 
E)  protists. 
A)  autotrophs. 
B)  herbivores. 
C)  heterotrophs. 
D)  photosynthetic. 
E)  protists.

Question 4

Which of the following statements about the tubular digestive tract of animals is false?

Accepted Answer

A)  Food is digested extracellularly. 
B)  There are two openings to the digestive tract. 
C)  Food must always be broken into smaller pieces before ingestion. 
D)  All digestion occurs inside the digestive tract. 
E)  The digestive tract has specialized segments. 
A)  Food is digested extracellularly. 
B)  There are two openings to the digestive tract. 
C)  Food must always be broken into smaller pieces before ingestion. 
D)  All digestion occurs inside the digestive tract. 
E)  The digestive tract has specialized segments.

Question 5

One of the consequences of smoking is a lowered level of _______, which are beneficial molecules that accept cholesterol and probably remove it from the tissues to the liver.

Accepted Answer

A)  chylomicrons 
B)  very-low-density lipoproteins 
C)  low-density lipoproteins 
D)  high-density lipoproteins 
E)  cholecystokinin 
A)  chylomicrons 
B)  very-low-density lipoproteins 
C)  low-density lipoproteins 
D)  high-density lipoproteins 
E)  cholecystokinin

Question 6

Which of the following statements about gastrin is false?

Accepted Answer

A)  It stimulates secretion of pepsin. 
B)  It stimulates secretion of HCl. 
C)  It is activated by low pH. 
D)  It increases motility in the stomach. 
E)  It is secreted in the lower part of the stomach. 
A)  It stimulates secretion of pepsin. 
B)  It stimulates secretion of HCl. 
C)  It is activated by low pH. 
D)  It increases motility in the stomach. 
E)  It is secreted in the lower part of the stomach.

Question 7

A lipase is an enzyme that breaks down

Accepted Answer

A)  carbohydrates. 
B)  nucleic acids. 
C)  proteins. 
D)  fat molecules. 
E)  fatty acids. 
A)  carbohydrates. 
B)  nucleic acids. 
C)  proteins. 
D)  fat molecules. 
E)  fatty acids.

Question 8

Most animals process their food through _______ digestion within a gut.

Accepted Answer

The answer of Most animals process their food through _______...

Question 9

Waves of muscle contractions that move the intestinal contents are

Accepted Answer

A)  caused by contraction of skeletal muscle. 
B)  regulated by liver secretions. 
C)  called peristalsis. 
D)  voluntary. 
E)  caused by smooth muscles of the gut relaxing in response to being stretched. 
A)  caused by contraction of skeletal muscle. 
B)  regulated by liver secretions. 
C)  called peristalsis. 
D)  voluntary. 
E)  caused by smooth muscles of the gut relaxing in response to being stretched.

Exam 51: Nutrition, Digestion, and Absorption

The _______ is the innermost tissue layer of the gut. It is a secretory and absorptive surface.

If a person drinks a sugar-containing soda, a significant amount of glucose is released into the blood stream. This will cause the pancreas to release

Organisms that derive their energy and molecular nutrients from other organisms are called

Which of the following statements about the tubular digestive tract of animals is false?

One of the consequences of smoking is a lowered level of _______, which are beneficial molecules that accept cholesterol and probably remove it from the tissues to the liver.

Which of the following statements about gastrin is false?

A lipase is an enzyme that breaks down

Most animals process their food through _______ digestion within a gut.

Waves of muscle contractions that move the intestinal contents are

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