Question 1

The first bioenergetic pathway to become active at the onset of exercise is

Accepted Answer

A)  glycolysis. 
B)  the ATP-CP system. 
C)  the Krebs cycle. 
D)  the electron transport chain. 
A)  glycolysis. 
B)  the ATP-CP system. 
C)  the Krebs cycle. 
D)  the electron transport chain. B

Question 2

The slow rise in oxygen uptake over time during high-intensity, prolonged exercise is due to

Accepted Answer

A)  high blood levels of lactic acid. 
B)  rising body temperature. 
C)  rising blood levels of insulin. 
D)  the increased amount of work necessary to maintain exercise. 
A)  high blood levels of lactic acid. 
B)  rising body temperature. 
C)  rising blood levels of insulin. 
D)  the increased amount of work necessary to maintain exercise. B

Question 3

The respiratory exchange ratio equals the respiratory quotient during short-term maximal exercise.

Accepted Answer

A) True 
 B)False  False

Question 4

The exercise intensity that promotes the greatest total grams of fat metabolized is

Accepted Answer

A)  20% of VO2 max. 
B)  50% of VO2 max. 
C)  80% of VO2 max. 
D)  100% of VO2 max. 
A)  20% of VO2 max. 
B)  50% of VO2 max. 
C)  80% of VO2 max. 
D)  100% of VO2 max.

Question 5

Which of the following is true about VO2 during exercise?

Accepted Answer

A)  VO2 increases linearly with work rate. 
B)  VO2 is an indicator of glycolytic ATP production. 
C)  VO2 drops sharply just prior to fatigue. 
D)  None of the above are true. 
A)  VO2 increases linearly with work rate. 
B)  VO2 is an indicator of glycolytic ATP production. 
C)  VO2 drops sharply just prior to fatigue. 
D)  None of the above are true.

Question 6

The oxygen debt is generally higher following heavy exercise when compared with light exercise because heavy exercise

Accepted Answer

A)  produces more lactic acid. 
B)  results in greater body heat gained, greater CP depleted, higher blood levels of epinephrine and norepinephrine, and greater depletion of blood and muscle oxygen stores. 
C)  results in a greater level of liver glycogen depletion. 
D)  is of shorter duration than light exercise. 
A)  produces more lactic acid. 
B)  results in greater body heat gained, greater CP depleted, higher blood levels of epinephrine and norepinephrine, and greater depletion of blood and muscle oxygen stores. 
C)  results in a greater level of liver glycogen depletion. 
D)  is of shorter duration than light exercise.

Question 7

The carbohydrate fuel source that becomes most important after 3-4 hours of moderate-intensity (~70% VO2 max) exercise is

Accepted Answer

A)  muscle glycogen. 
B)  blood glucose. 
C)  muscle triglycerides. 
D)  plasma FFA. 
A)  muscle glycogen. 
B)  blood glucose. 
C)  muscle triglycerides. 
D)  plasma FFA.

Question 8

Energy to run a 40-yard dash comes

Accepted Answer

A)  almost exclusively from the ATP-CP system. 
B)  exclusively from glycolysis. 
C)  almost exclusively from aerobic metabolism. 
D)  from a combination of aerobic/anaerobic metabolism, with most of the ATP being produced aerobically. 
A)  almost exclusively from the ATP-CP system. 
B)  exclusively from glycolysis. 
C)  almost exclusively from aerobic metabolism. 
D)  from a combination of aerobic/anaerobic metabolism, with most of the ATP being produced aerobically.

Question 9

During moderate-intensity (65% VO2 max) exercise, the percent of ATP derived from carbohydrates is ___________ the percent ATP from fats.

Accepted Answer

A)  less than 
B)  equal to 
C)  greater than 
A)  less than 
B)  equal to 
C)  greater than

Question 10

A respiratory quotient (RQ) of 0.95 during steady-state exercise is suggestive of a(n)

Accepted Answer

A)  high rate of carbohydrate metabolism. 
B)  high rate of fat metabolism. 
C)  equal rate of fat/carbohydrate metabolism. 
D)  high rate of protein metabolism. 
A)  high rate of carbohydrate metabolism. 
B)  high rate of fat metabolism. 
C)  equal rate of fat/carbohydrate metabolism. 
D)  high rate of protein metabolism.

Question 11

The RER can rise above 1.00

Accepted Answer

A)  during high-intensity exercise. 
B)  if VCO2 > VO2. 
C)  when the buffering of lactic acid stimulates ventilation to blow off CO2. 
D)  when all of these occur. 
A)  during high-intensity exercise. 
B)  if VCO2 > VO2. 
C)  when the buffering of lactic acid stimulates ventilation to blow off CO2. 
D)  when all of these occur.

Question 12

The primary fuel source during light-intensity (25% VO2 max) exercise is

Accepted Answer

A)  muscle glycogen. 
B)  blood glucose. 
C)  muscle triglycerides. 
D)  plasma FFA. 
A)  muscle glycogen. 
B)  blood glucose. 
C)  muscle triglycerides. 
D)  plasma FFA.

Question 13

At rest, the O2 consumption of a 70-kg young adult is approximately

Accepted Answer

A)  250 ml/min. 
B)  0.25 L/min. 
C)  3.5 ml/kg/min. 
D)  all of the above. 
A)  250 ml/min. 
B)  0.25 L/min. 
C)  3.5 ml/kg/min. 
D)  all of the above.

Question 14

Lactic acid accumulation contributes to muscle fatigue during exercise and causes the muscle soreness that may occur 24-48 hours after exercising.

Accepted Answer

A) True 
 B)False

Question 15

The maximal rate of fat oxidation, FATmax, typically occurs just before

Accepted Answer

A)  VO?2 max. 
B)  the LT. 
C)  oxygen deficit. 
D)  EPOC. 
A)  VO?2 max. 
B)  the LT. 
C)  oxygen deficit. 
D)  EPOC.

Question 16

The RQ for fat is

Accepted Answer

A)  0.70. 
B)  0.82. 
C)  0.85. 
D)  1.00. 
A)  0.70. 
B)  0.82. 
C)  0.85. 
D)  1.00.

Question 17

When calculating the RQ, protein is often ignored. Why?

Accepted Answer

A)  because protein generally plays a small role as a substrate 
B)  because it is impossible to calculate the RQ for protein 
C)  because protein cannot be used as a substrate during exercise 
D)  because the RQ for protein is 0 
A)  because protein generally plays a small role as a substrate 
B)  because it is impossible to calculate the RQ for protein 
C)  because protein cannot be used as a substrate during exercise 
D)  because the RQ for protein is 0

Question 18

The term oxygen deficit refers to the

Accepted Answer

A)  lag in oxygen consumption at the beginning of exercise. 
B)  excess oxygen consumption during recovery from exercise. 
C)  amount of oxygen required to maintain a steady state during constant-load exercise. 
D)  amount of oxygen utilized by the ATP-PC system in the first few minutes of exercise. 
A)  lag in oxygen consumption at the beginning of exercise. 
B)  excess oxygen consumption during recovery from exercise. 
C)  amount of oxygen required to maintain a steady state during constant-load exercise. 
D)  amount of oxygen utilized by the ATP-PC system in the first few minutes of exercise.

Question 19

Trained individuals usually produce less lactate than untrained individuals when making the transition from rest to steady-state exercise.

Accepted Answer

A) True 
 B)False

Question 20

The process of breaking down triglycerides into free fatty acids and glycerol is called

Accepted Answer

A)  beta oxidation. 
B)  glycogenolysis. 
C)  lipolysis. 
D)  lipogenesis. 
A)  beta oxidation. 
B)  glycogenolysis. 
C)  lipolysis. 
D)  lipogenesis.

Exam 5: Exercise Metabolism

The first bioenergetic pathway to become active at the onset of exercise is

The slow rise in oxygen uptake over time during high-intensity, prolonged exercise is due to

The respiratory exchange ratio equals the respiratory quotient during short-term maximal exercise.

The exercise intensity that promotes the greatest total grams of fat metabolized is

Which of the following is true about VO2 during exercise?

The oxygen debt is generally higher following heavy exercise when compared with light exercise because heavy exercise

The carbohydrate fuel source that becomes most important after 3-4 hours of moderate-intensity (~70% VO2 max) exercise is

Energy to run a 40-yard dash comes

During moderate-intensity (65% VO2 max) exercise, the percent of ATP derived from carbohydrates is ___________ the percent ATP from fats.

A respiratory quotient (RQ) of 0.95 during steady-state exercise is suggestive of a(n)

The RER can rise above 1.00

The primary fuel source during light-intensity (25% VO2 max) exercise is

At rest, the O2 consumption of a 70-kg young adult is approximately

Lactic acid accumulation contributes to muscle fatigue during exercise and causes the muscle soreness that may occur 24-48 hours after exercising.

The maximal rate of fat oxidation, FATmax, typically occurs just before

The RQ for fat is

When calculating the RQ, protein is often ignored. Why?

The term oxygen deficit refers to the

Trained individuals usually produce less lactate than untrained individuals when making the transition from rest to steady-state exercise.

The process of breaking down triglycerides into free fatty acids and glycerol is called

Introduction to Exercise Physiology

Common Measurements in Exercise Physiology

Control of the Internal Environment

Bioenergetics

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

Temperature Regulation

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

Which of the following is true about VO₂ during exercise?

The carbohydrate fuel source that becomes most important after 3-4 hours of moderate-intensity (~70% VO₂ max) exercise is

During moderate-intensity (65% VO₂ max) exercise, the percent of ATP derived from carbohydrates is ___________ the percent ATP from fats.

The primary fuel source during light-intensity (25% VO₂ max) exercise is

At rest, the O₂ consumption of a 70-kg young adult is approximately

The maximal rate of fat oxidation, FAT_max, typically occurs just before