Section 9.3

Question 1

thermoregulation

Answer 1

the regulation of internal temperature by negative feedback mechanisms

Question 2

homeotherm

Answer 2

an animal that maintains a stable body temperature regardless of the temperature of the external environment.

Question 3

poikilotherm

Answer 3

an animal whose body temperature varies with, and often matches, the temperature of the external environment.

Question 4

endotherm

Answer 4

an animal that maintains its body temperature by internal mechanisms

Question 5

ectotherm

Answer 5

an animal that maintains its body temperature by absorbing thermal energy from the environment.

Question 6

thermal acclimatization

Answer 6

the process by which an animal gradually adjusts to temperature changes in its environment.

Question 7

torpor

Answer 7

a sleeplike state in which the metabolic rate and body temperature drop in response to variations in daily temperature.

Question 8

hibernation

Answer 8

A state of greatly reduced metabolic rate and activity that enables an animal to survive the winter by reducing the demand for energy when food is unavailable.

Question 9

estivation

Answer 9

a state of torpor that enables an animal to survive the summer by reducing the demand for energy