Question 1

The lactate threshold is defined as the work rate or oxygen uptake at which there is a systematic

Accepted Answer

A) rise in blood levels of lactate dehydrogenase. 
B) rise in aerobic metabolism. 
C) decrease in blood lactic acid concentration. 
D) rise in blood levels of lactic acid. 
A) rise in blood levels of lactate dehydrogenase. 
B) rise in aerobic metabolism. 
C) decrease in blood lactic acid concentration. 
D) rise in blood levels of lactic acid. D

Question 2

During steady-state exercise,an RQ of 0.73 would indicate

Accepted Answer

A) a high level of fat metabolism. 
B) a high level of carbohydrate metabolism. 
C) a high level of protein metabolism. 
D) None of the answers above are correct 
A) a high level of fat metabolism. 
B) a high level of carbohydrate metabolism. 
C) a high level of protein metabolism. 
D) None of the answers above are correct A

Question 3

During the "rapid" portion of the oxygen debt (or EPOC),the excess VO2 is due to

Accepted Answer

A) high body temperature. 
B) gluconeogenesis. 
C) restoration of muscle CP and replacement of blood and muscle oxygen stores. 
D) elevated blood levels of epinephrine and norepinephrine. 
A) high body temperature. 
B) gluconeogenesis. 
C) restoration of muscle CP and replacement of blood and muscle oxygen stores. 
D) elevated blood levels of epinephrine and norepinephrine. C

Question 4

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 5

Exercise trained individuals usually produce less lactate than untrained individuals during the transition from rest to steady-state exercise.

Accepted Answer

A) True 
 B)False

Question 6

The drift upward of VO2 during constant-load exercise in a hot environment is due to

Accepted Answer

A) rising blood levels of lactate. 
B) decreasing blood levels of hormones. 
C) increasing body temperature. 
D) decreasing body temperature. 
A) rising blood levels of lactate. 
B) decreasing blood levels of hormones. 
C) increasing body temperature. 
D) decreasing body temperature.

Question 7

The energy to perform long-term exercise (i.e. ,>30 minutes)comes primarily from

Accepted Answer

A) aerobic metabolism. 
B) a combination of aerobic/anaerobic metabolism,with anaerobic metabolism producing the bulk of the ATP. 
C) anaerobic metabolism. 
D) anaerobic metabolism,with the ATP-PC system producing the bulk of the ATP. 
A) aerobic metabolism. 
B) a combination of aerobic/anaerobic metabolism,with anaerobic metabolism producing the bulk of the ATP. 
C) anaerobic metabolism. 
D) anaerobic metabolism,with the ATP-PC system producing the bulk of the ATP.

Question 8

Which of the following is true of the Cori cycle?

Accepted Answer

A) This cycle can decrease blood lactate concentration by liver removal of lactate from the blood and converting this lactate into glucose. 
B) This cycle plays a key role in gluconeogenesis in skeletal muscle. 
C) This cycle coverts glycogen into lactate in the liver. 
D) This cycle is responsible for converting amino acids into glucose. 
A) This cycle can decrease blood lactate concentration by liver removal of lactate from the blood and converting this lactate into glucose. 
B) This cycle plays a key role in gluconeogenesis in skeletal muscle. 
C) This cycle coverts glycogen into lactate in the liver. 
D) This cycle is responsible for converting amino acids into glucose.

Question 9

Lactate is formed and accumulates in the muscle when the rate of glycolytic production of NADH exceeds the rate at which these products are shuttled into the mitochondria.

Accepted Answer

A) True 
 B)False

Question 10

The first bioenergetic pathway to become active in skeletal muscle 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.

Question 11

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 brain 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 brain in the first few minutes of exercise.

Question 12

Depletion of muscle carbohydrate stores during exercise can decrease the ability of the muscle to metabolize fat by

Accepted Answer

A) decreasing the rate of muscle lactic acid production. 
B) reducing the concentrations of citric acid cycle intermediates. 
C) increasing the rate of protein metabolism. 
D) reducing the rate of protein metabolism. 
A) decreasing the rate of muscle lactic acid production. 
B) reducing the concentrations of citric acid cycle intermediates. 
C) increasing the rate of protein metabolism. 
D) reducing the rate of protein metabolism.

Question 13

Any factor that increases the amino acid pool in the muscle can enhance protein metabolism in the exercising muscle.Which of the following factors can increase the amino acid pool in the muscle?

Accepted Answer

A) short-duration (i.e. ,1-3 minutes)high intensity exercise. 
B) prolonged exercise (> 2 hours). 
C) high levels of lactate in the blood. 
D) None of the above answers are correct. 
A) short-duration (i.e. ,1-3 minutes)high intensity exercise. 
B) prolonged exercise (> 2 hours). 
C) high levels of lactate in the blood. 
D) None of the above answers are correct.

Question 14

The exercise intensity that promotes the highest amount of total fat oxidation is approximately

Accepted Answer

A) 30% of VO2 max. 
B) 60% of VO2 max. 
C) 75% of VO2 max. 
D) 90% of VO2 max. 
A) 30% of VO2 max. 
B) 60% of VO2 max. 
C) 75% of VO2 max. 
D) 90% of VO2 max.

Question 15

Most of the carbohydrate (e.g. ,for a rested,well-fed athlete)used as a substrate during high-intensity exercise comes from

Accepted Answer

A) muscle glycogen stores. 
B) blood glucose. 
C) liver glycogen stores. 
D) glycogen stored in fat cells 
A) muscle glycogen stores. 
B) blood glucose. 
C) liver glycogen stores. 
D) glycogen stored in fat cells

Question 16

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 eliminate 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 eliminate CO2. 
D) when all of these occur.

Question 17

When using the RQ to estimate fuel usage during exercise,the role that protein plays as a fuel source is often ignored.Why?

Accepted Answer

A) because protein generally plays a relatively small role as a fuel source during exercise 
B) because protein cannot be used a fuel in skeletal muscle 
C) because protein is only used as a fuel in muscle during short duration exercise lasting less than 20 seconds. 
D) none of the above answers are correct. 
A) because protein generally plays a relatively small role as a fuel source during exercise 
B) because protein cannot be used a fuel in skeletal muscle 
C) because protein is only used as a fuel in muscle during short duration exercise lasting less than 20 seconds. 
D) none of the above answers are correct.

Question 18

Which of the following factors could explain the rise in blood lactic acid at the lactate threshold?

Accepted Answer

A) an increased rate of lactate production 
B) a decreased rate of removal of lactic acid from the blood 
C) both A and B are correct 
D) none of the above answers are correct. 
A) an increased rate of lactate production 
B) a decreased rate of removal of lactic acid from the blood 
C) both A and B are correct 
D) none of the above answers are correct.

Question 19

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 20

Which of the following would NOT increase (whole body)oxygen consumption during recovery from exercise and increase excess post-exercise oxygen consumption (EPOC)?

Accepted Answer

A) high intensity of exercise 
B) elevated body temperature above normal 
C) high blood levels of hormones (i.e. ,epinephrine) 
D) None of the above answers are true 
A) high intensity of exercise 
B) elevated body temperature above normal 
C) high blood levels of hormones (i.e. ,epinephrine) 
D) None of the above answers are true

Exam 5: Exercise Metabolism

The lactate threshold is defined as the work rate or oxygen uptake at which there is a systematic

During steady-state exercise,an RQ of 0.73 would indicate

During the "rapid" portion of the oxygen debt (or EPOC),the excess VO2 is due to

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

Exercise trained individuals usually produce less lactate than untrained individuals during the transition from rest to steady-state exercise.

The drift upward of VO2 during constant-load exercise in a hot environment is due to

The energy to perform long-term exercise (i.e. ,>30 minutes)comes primarily from

Which of the following is true of the Cori cycle?

Lactate is formed and accumulates in the muscle when the rate of glycolytic production of NADH exceeds the rate at which these products are shuttled into the mitochondria.

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

The term oxygen deficit refers to the

Depletion of muscle carbohydrate stores during exercise can decrease the ability of the muscle to metabolize fat by

Any factor that increases the amino acid pool in the muscle can enhance protein metabolism in the exercising muscle.Which of the following factors can increase the amino acid pool in the muscle?

The exercise intensity that promotes the highest amount of total fat oxidation is approximately

Most of the carbohydrate (e.g. ,for a rested,well-fed athlete)used as a substrate during high-intensity exercise comes from

The RER can rise above 1.00

When using the RQ to estimate fuel usage during exercise,the role that protein plays as a fuel source is often ignored.Why?

Which of the following factors could explain the rise in blood lactic acid at the lactate threshold?

Energy to run a 40-yard dash comes

Which of the following would NOT increase (whole body)oxygen consumption during recovery from exercise and increase excess post-exercise oxygen consumption (EPOC)?

Introduction to Exercise Physiology

A: Common Measurements in Exercise Physiology

B: Common Measurements in Exercise Physiology

Control of the Internal Environment

Bioenergetics

Cell Signaling and Hormonal Response 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

Temperature Regulation

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

Preventing Chronic Disease: Physical Activity and Healthy Eating

Work Tests to Evaluate Cardiorespiratory Fitness

Exercise Prescriptions for Health and Fitness

Exercise Prescriptions for Health and Fitness

Nutrition and Body Composition 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

During the "rapid" portion of the oxygen debt (or EPOC),the excess VO₂ is due to

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

The drift upward of VO₂ during constant-load exercise in a hot environment is due to