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Biology

Eric P. Widmaier; Linda E. Graham; Robert J. Brooker

Chapter 46

Control of Energy Balance, Metabolic Rate, and Body Temperature - all with Video Answers

Educators

Chapter Questions

02:22

Problem 1

During the absorptive state, an animal is
a. fasting.
b. relying entirely on stored molecules for energy.
c. absorbing nutrients from a recently ingested meal.
d. metabolizing lipids stored in adipose tissue to supply ATP to its cells.
e. doing both a and b.

Kathleen Jerome
Kathleen Jerome
Numerade Educator
01:49

Problem 2

Gluconeogenesis
a. occurs when the liver synthesizes glucose from noncarbohydrate
precursors.
b. is the process by which glycogen is broken down to glucose.
c. occurs primarily when an animal is in the absorptive state.
d. occurs when triglycerides are being formed and stored in adipose cells.
e. occurs primarily in skeletal muscle.

Kathleen Jerome
Kathleen Jerome
Numerade Educator
02:33

Problem 3

In the process of ______________, most tissues of the vertebrate body metabolize fat instead of glucose to ensure that _____________ tissue
has an adequate supply of glucose.
a. gluconeogenesis, muscle
b. glucose sparing, epithelial
c. glycogenolysis, nervous
d. glucose sparing, nervous
e. gluconeogenesis, epithelial

Kathleen Jerome
Kathleen Jerome
Numerade Educator
01:30

Problem 4

Ketones are compounds that are derived from _______ and are synthesized primarily in the _________ state.
a. glucose, absorptive
b. glycogen, absorptive
c. fatty acids, postabsorptive
d. amino acids, postabsorptive
e. triglycerides, absorptive

Kathleen Jerome
Kathleen Jerome
Numerade Educator
02:13

Problem 5

Insulin primarily regulates the blood glucose concentration by
a. stimulating the recruitment of GLUTs from the cytosol to the plasma membrane for transport of glucose from extracellular to intracellular fluid.
b. stimulating gluconeogenesis.
c. suppressing glucose uptake by muscle tissue.
d. stimulating the release of glucose from glycogen reserves in the liver.
e. inhibiting the synthesis of new GLUTs.

Kathleen Jerome
Kathleen Jerome
Numerade Educator
01:30

Problem 6

The rate at which an animal uses energy is called
a. body mass index.
b. the animal's energy consumption.
c. metabolic rate.
d. nonshivering thermogenesis.
e. shivering thermogenesis.

Kathleen Jerome
Kathleen Jerome
Numerade Educator
02:25

Problem 7

Which factor may increase metabolic rate?
a. shivering
b. decreased muscle activity
c. sleeping
d. consumption of a meal
e. both a and d

Kathleen Jerome
Kathleen Jerome
Numerade Educator
01:37

Problem 8

Which molecule acts on brain centers to decrease appetite in mammals and other vertebrates?
a. GLUT4
b. glycogen
c. leptin
d. glucagon
e. a ketone

Kathleen Jerome
Kathleen Jerome
Numerade Educator
02:55

Problem 9

Animals that have body temperatures that are maintained within a narrow range are
a. endotherms.
b. ectotherms.
c. homeotherms.
d. heterotherms.
e. both b and d.

Kathleen Jerome
Kathleen Jerome
Numerade Educator
02:33

Problem 10

The rate of heat loss in a mammal is regulated by
a. the degree of blood flow at the surface of the skin.
b. the amount of perspiration.
c. behavioral adaptations.
d. air currents near the animal's body.
e. all of the above.

Kathleen Jerome
Kathleen Jerome
Numerade Educator