Biology: The Dynamic Science

Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter 47

Animal Nutrition - all with Video Answers

Educators

Chapter Questions

Problem 1

Required molecules that animals cannot synthesize are called:
a. nutrients.
b. essential nutrients.
c. enzymes.
d. proteins.
e. carbohydrates.

Joanna Quigley

Joanna Quigley

Numerade Educator

Problem 2

Which of the following accurately describes a feeding style?
a. Deposit feeders obtain nutrients from organic molecules in solution.
b. $\quad$ Deposit feeders scrape organic matter from solid material on which they live.
c. Fluid feeders digest organisms suspended in water.
d. Fluid feeders strain food with networks of mucus or bristles and hairs.
E. Suspension feeders consume sizable food whole or in chunks.

Joanna Quigley

Numerade Educator

Problem 3

The order of successive steps in digestion is:
a. absorption follows enzymatic hydrolysis.
b. $\quad$ secretion of enzymes follows absorption of digestive material.
c. mechanical processing follows enzyme secretion.
d. mechanical processing follows enzymatic hydrolysis.
e. enzymatic hydrolysis precedes secretion of digestive aids.

Joanna Quigley

Numerade Educator

Problem 4

The esophagus, crop, gizzard, and intestine are found in:
a. birds and mammals.
b. insects and mammals.
c. flatworms and birds.
d. earthworms and birds.
e. sponges and cnidarians.

Joanna Quigley

Numerade Educator

Problem 5

Which of the following is not an essential nutrient in humans?
a. vitamin B
b. calcium
c. glycogen
d. linoleic acid
e. vitamin K

Joanna Quigley

Numerade Educator

Problem 6

A specialized region of the digestive tract is/are the:
a. submucosa formed by circular and longitudinal layers.
b. serosa lining the digestive tract for absorption.
c. $\quad$ mucosa composed of thick, elastic connective tissue for movement.
d. muscularis, an outer layer that secretes a slippery material to prevent friction with other organs.
e. sphincters, which form valves between major digestive organs.

Joanna Quigley

Numerade Educator

Problem 7

If the fat in whole milk is ingested:
a. $\quad$ the stomach, with its high $\mathrm{pH}$, will stimulate cells of the duodenum to hasten stomach emptying.
b. $\quad$ parietal cells in the stomach will absorb it.
c. in the small intestine, bile salts emulsify the fats and then lipase hydrolyzes them.
d. lactase deficiency in the small intestine would prevent its digestion.
e. $\quad$ microvilli will absorb the fat in the form of chylomicrons directly into the blood of the hepatic portal vein.

Joanna Quigley

Numerade Educator

Problem 8

The role of the liver in digestion is to:
a. synthesize aminopeptidase and dipeptidase to digest polypeptides.
b. synthesize lipase to form free fatty acids.
c. secrete trypsin to break the bonds in polypeptides.
d. secrete bile and bicarbonate ions to help emulsify fats.
e. store bile between meals.

Joanna Quigley

Numerade Educator

Problem 9

Which of the following best describes regulation of digestion?
a. GIP inhibits insulin release from the pancreas.
b. Gastrin stimulates pancreatic secretion of $\mathrm{HCl}$ and pepsinogen.
c. Secretin stimulates gastric emptying into the duodenum.
d. CCK stimulates gastric activity to activate the duodenum.
e. Leptin binds different hypothalamic receptors to stimulate or inhibit appetite.

Joanna Quigley

Numerade Educator

Problem 10

An example of a digestive specialization is seen in:
a. the long intestines characteristic of herbivores
b. the incisors being the dominant teeth in wolve
c. the canine teeth being the dominant teeth in
d. salivary lipase being made by humans.
e. $\quad$ cellulose being made by humans.

Joanna Quigley

Numerade Educator