Question 1

The transfer of heat from the body into molecules of cooler objects in contact with its surface is called

Accepted Answer

A)  radiation. 
B)  conduction. 
C)  convection. 
D)  evaporation. 
A)  radiation. 
B)  conduction. 
C)  convection. 
D)  evaporation. B

Question 2

In general, at high environmental temperatures, the most important variable determining heat loss by evaporation is/are the

Accepted Answer

A)  convective currents. 
B)  ambient temperature and relative humidity. 
C)  amount of exposed skin. 
D)  all of the above. 
A)  convective currents. 
B)  ambient temperature and relative humidity. 
C)  amount of exposed skin. 
D)  all of the above. D

Question 3

The principal means of heat loss at rest in a cool environment (20$\degree$C/low humidity) is via

Accepted Answer

A)  radiation. 
B)  conduction. 
C)  evaporation. 
D)  convection. 
A)  radiation. 
B)  conduction. 
C)  evaporation. 
D)  convection. A

Question 4

During exercise ____________ of energy produced is released as heat.

Accepted Answer

A)  <10% 
B)  20-30% 
C)  50% 
D)  70-80% kcal 
A)  <10% 
B)  20-30% 
C)  50% 
D)  70-80% kcal

Question 5

The body's thermostat is located in the

Accepted Answer

A)  cerebellum. 
B)  brain stem. 
C)  hypothalamus. 
D)  thalamus. 
A)  cerebellum. 
B)  brain stem. 
C)  hypothalamus. 
D)  thalamus.

Question 6

Which of the following statements about body temperature homeostasis is correct?

Accepted Answer

A)  Body temperature is a balance between heat loss and heat gain. 
B)  Core temperature is maintained at 34$\degree$C. 
C)  Skin temperature is usually equal to core temperature. 
D)  All of the above statements are correct. 
A)  Body temperature is a balance between heat loss and heat gain. 
B)  Core temperature is maintained at 34$\degree$C. 
C)  Skin temperature is usually equal to core temperature. 
D)  All of the above statements are correct.

Question 7

The most accurate way to measure core body temperature is with a tympanic thermometer.

Accepted Answer

A) True 
 B)False

Question 8

Cold adaptation results in a reduction in the mean skin temperature at which shivering begins.

Accepted Answer

A) True 
 B)False

Question 9

Training in a cool environment while wearing warm clothing (e.g., sweats) promotes heat acclimatization.

Accepted Answer

A) True 
 B)False

Question 10

Heat acclimatization occurs generally within

Accepted Answer

A)  1 to 2 days. 
B)  less than 7 days. 
C)  7 to 14 days. 
D)  15 to 30 days. 
A)  1 to 2 days. 
B)  less than 7 days. 
C)  7 to 14 days. 
D)  15 to 30 days.

Question 11

During exercise, body temperature is regulated by making adjustments in the amount of heat that is lost.

Accepted Answer

A) True 
 B)False

Question 12

Hypothermia is defined as a large

Accepted Answer

A)  decrease in skin temperature. 
B)  decrease in core (body) temperature. 
C)  increase in core temperature. 
D)  decrease in skin blood flow. 
A)  decrease in skin temperature. 
B)  decrease in core (body) temperature. 
C)  increase in core temperature. 
D)  decrease in skin blood flow.

Question 13

Evaporation of one liter of sweat would result in the loss of ________ kcal of heat.

Accepted Answer

A)  100 
B)  500 
C)  540 
D)  580 
A)  100 
B)  500 
C)  540 
D)  580

Question 14

An increase in core temperature results in

Accepted Answer

A)  cutaneous vasoconstriction. 
B)  cutaneous vasodilation. 
C)  thyroxine release. 
D)  shivering. 
A)  cutaneous vasoconstriction. 
B)  cutaneous vasodilation. 
C)  thyroxine release. 
D)  shivering.

Question 15

Exercise in the heat is associated with accelerated fatigue due to

Accepted Answer

A)  increased muscle glycogen utilization. 
B)  increased free radical production. 
C)  increased lactate production. 
D)  all of the above. 
A)  increased muscle glycogen utilization. 
B)  increased free radical production. 
C)  increased lactate production. 
D)  all of the above.

Question 16

Compared to exercise in a cool environment, prolonged exercise in the heat

Accepted Answer

A)  may decrease muscle production of free radicals. 
B)  increases muscle blood flow. 
C)  decreases muscle lactate production. 
D)  results in a more rapid onset of muscular fatigue. 
A)  may decrease muscle production of free radicals. 
B)  increases muscle blood flow. 
C)  decreases muscle lactate production. 
D)  results in a more rapid onset of muscular fatigue.

Question 17

Which of the following is true of heat shock proteins?

Accepted Answer

A)  Repeated bouts of exercise in warm or hot environments decrease their synthesis. 
B)  They destabilize and unfold functional cellular proteins. 
C)  They help the body tolerate heat stress. 
D)  They help the body tolerate cold stress. 
A)  Repeated bouts of exercise in warm or hot environments decrease their synthesis. 
B)  They destabilize and unfold functional cellular proteins. 
C)  They help the body tolerate heat stress. 
D)  They help the body tolerate cold stress.

Question 18

In general, during exercise in a thermoneutral environment, the increase in core temperature is directly related to the exercise intensity.

Accepted Answer

A) True 
 B)False

Question 19

Individuals with a high percentage of body fat have an advantage over lean individuals in tolerance to cold.

Accepted Answer

A) True 
 B)False

Question 20

In response to a decrease in body temperature, the __________ initiates the release of norepinephrine, which increases the rate of cellular metabolism.

Accepted Answer

A)  cerebrum 
B)  posterior hypothalamus 
C)  anterior hypothalamus 
D)  medial hypothalamus 
A)  cerebrum 
B)  posterior hypothalamus 
C)  anterior hypothalamus 
D)  medial hypothalamus

Exam 13: Temperature Regulation

The transfer of heat from the body into molecules of cooler objects in contact with its surface is called

In general, at high environmental temperatures, the most important variable determining heat loss by evaporation is/are the

The principal means of heat loss at rest in a cool environment (20 °\degree° C/low humidity) is via

During exercise ____________ of energy produced is released as heat.

The body's thermostat is located in the

Which of the following statements about body temperature homeostasis is correct?

The most accurate way to measure core body temperature is with a tympanic thermometer.

Cold adaptation results in a reduction in the mean skin temperature at which shivering begins.

Training in a cool environment while wearing warm clothing (e.g., sweats) promotes heat acclimatization.

Heat acclimatization occurs generally within

During exercise, body temperature is regulated by making adjustments in the amount of heat that is lost.

Hypothermia is defined as a large

Evaporation of one liter of sweat would result in the loss of ________ kcal of heat.

An increase in core temperature results in

Exercise in the heat is associated with accelerated fatigue due to

Compared to exercise in a cool environment, prolonged exercise in the heat

Which of the following is true of heat shock proteins?

In general, during exercise in a thermoneutral environment, the increase in core temperature is directly related to the exercise intensity.

Individuals with a high percentage of body fat have an advantage over lean individuals in tolerance to cold.

In response to a decrease in body temperature, the __________ initiates the release of norepinephrine, which increases the rate of cellular metabolism.

Introduction to Exercise Physiology

Common Measurements in Exercise Physiology

Control of the Internal Environment

Bioenergetics

Exercise Metabolism

Cell Signaling and the Hormonal Responses to Exercise

Exercise and the Immune System

The Nervous System: Structure and Control of Movement

Skeletal Muscle: Structure and Function

Circulatory Responses to Exercise

Respiration During Exercise

Acid-Base Balance During Exercise

The Physiology of Training: Effect on Vo2 Max, Performance, and Strength

Risk Factors and Inflammation: Links to Chronic Disease

Exercise Prescriptions for Health and Fitness

Exercise for Special Populations

Body Composition and Nutrition for Health

Factors Affecting Performance

Laboratory Assessment of Human Performance

Training for Performance

Training for the Female Athlete, Children, Special Populations, and the Masters Athlete

Nutrition, Body Composition, and Performance

Exercise and the Environment

Ergogenic Aids

Filters

The principal means of heat loss at rest in a cool environment (20 $\degree$ C/low humidity) is via