Question 1

Under normal conditions at sea level,the partial pressure of oxygen in the alveoli region of the lung is

Accepted Answer

A) 760 mmHg. 
B) 159 mmHg. 
C) 125 mmHg. 
D) 100 mmHg. 
A) 760 mmHg. 
B) 159 mmHg. 
C) 125 mmHg. 
D) 100 mmHg.

Question 2

According to Fick's law of diffusion,the rate of diffusion of a gas across a tissue is directly proportional to the

Accepted Answer

A) tissue area. 
B) diffusion coefficient of the gas. 
C) difference in partial pressure of the gas on the two sides of the tissue. 
D) all of the above answers are correct 
A) tissue area. 
B) diffusion coefficient of the gas. 
C) difference in partial pressure of the gas on the two sides of the tissue. 
D) all of the above answers are correct

Question 3

Carbon dioxide is transported in arterial blood principally as

Accepted Answer

A) carbaminohemoglobin. 
B) dissolved CO2 in solution in the blood. 
C) bicarbonate. 
D) carbon monoxide. 
A) carbaminohemoglobin. 
B) dissolved CO2 in solution in the blood. 
C) bicarbonate. 
D) carbon monoxide.

Question 4

Which of the following statements about pulmonary physiology is correct?

Accepted Answer

A) The PO2 of inspired air at sea level is approximately 159 mmHg. 
B) The percentage of CO2 in the air is 0.0003. 
C) The percentage of O2 in the air at sea level is the same as at high altitude. 
D) All of the above answers are correct 
A) The PO2 of inspired air at sea level is approximately 159 mmHg. 
B) The percentage of CO2 in the air is 0.0003. 
C) The percentage of O2 in the air at sea level is the same as at high altitude. 
D) All of the above answers are correct

Question 5

In a healthy individual resting at sea level,which of following characteristics of arterial blood are correct?

Accepted Answer

A) PO2 of approximately 100 mmHg. 
B) oxyhemoglobin saturation of 97-98%. 
C) oxygen content of 20 ml O2 / 100 ml blood. 
D) all of the above answers are correct. 
A) PO2 of approximately 100 mmHg. 
B) oxyhemoglobin saturation of 97-98%. 
C) oxygen content of 20 ml O2 / 100 ml blood. 
D) all of the above answers are correct.

Question 6

During resting conditions,the intrapleural pressure is typically lower than the intrapulmonary pressure.

Accepted Answer

A) True 
 B)False

Question 7

Small changes in arterial PCO2 have a ______________ effect on ventilation compared to small changes in PO2.

Accepted Answer

A) greater 
B) lesser 
C) the same 
D) none of the above answers are correct 
A) greater 
B) lesser 
C) the same 
D) none of the above answers are correct

Question 8

At a low PO2,myoglobin has _______________ affinity for O2 than hemoglobin.

Accepted Answer

A) a higher 
B) a lower 
C) the same 
D) none of the above answers are correct 
A) a higher 
B) a lower 
C) the same 
D) none of the above answers are correct

Question 9

A decline in arterial PO2 to 70 mm Hg or below would likely result in

Accepted Answer

A) a decrease in alveolar ventilation. 
B) an increase in alveolar ventilation. 
C) no change in alveolar ventilation. 
D) a prolonged breath hold. 
A) a decrease in alveolar ventilation. 
B) an increase in alveolar ventilation. 
C) no change in alveolar ventilation. 
D) a prolonged breath hold.

Question 10

The pulmonary system does not limit VO2 max in elite endurance athletes that exhibit exercise-induced hypoxemia.

Accepted Answer

A) True 
 B)False

Question 11

The most important muscle of inspiration is/are the

Accepted Answer

A) diaphragm. 
B) rectus abdominis. 
C) internal oblique. 
D) external intercostals. 
A) diaphragm. 
B) rectus abdominis. 
C) internal oblique. 
D) external intercostals.

Question 12

An increase in blood temperature and a decrease in blood pH would result in _____________ in the oxyhemoglobin dissociation curve.

Accepted Answer

A) a rightward shift 
B) a leftward shift 
C) no change in 
D) none of the above answers are correct 
A) a rightward shift 
B) a leftward shift 
C) no change in 
D) none of the above answers are correct

Question 13

The primary drive to increase ventilation during exercise is due to

Accepted Answer

A) input from peripheral chemoreceptors. 
B) input from central chemoreceptors. 
C) input from skeletal muscle mechanoreceptors 
D) none of the above answers are correct 
A) input from peripheral chemoreceptors. 
B) input from central chemoreceptors. 
C) input from skeletal muscle mechanoreceptors 
D) none of the above answers are correct

Question 14

Most of the O2 contained in the blood

Accepted Answer

A) exists in solution as a dissolved gas. 
B) is bound to hemoglobin as oxyhemoglobin. 
C) is in the form of carboxyhemoglobin. 
D) is in the form of deoxyhemoglobin. 
A) exists in solution as a dissolved gas. 
B) is bound to hemoglobin as oxyhemoglobin. 
C) is in the form of carboxyhemoglobin. 
D) is in the form of deoxyhemoglobin.

Question 15

Research indicates that several months of endurance training results in significant changes in both lung structure and pulmonary function.

Accepted Answer

A) True 
 B)False

Question 16

A ventilation-perfusion (V/Q)ratio of 0.64 would indicate

Accepted Answer

A) an ideal V/Q ratio for optimal gas exchange. 
B) that blood flow is higher than ventilation in this region of the lung. 
C) that ventilation is higher than blood flow in this region of the lung. 
D) none of the above answers are correct 
A) an ideal V/Q ratio for optimal gas exchange. 
B) that blood flow is higher than ventilation in this region of the lung. 
C) that ventilation is higher than blood flow in this region of the lung. 
D) none of the above answers are correct

Question 17

An increase in alveolar ventilation (at rest)resulting in hyperventilation will reduce arterial ______and increase______.

Accepted Answer

A) PCO2,pH 
B) O2,pH 
C) pH,PCO2 
D) None of the above questions are correct 
A) PCO2,pH 
B) O2,pH 
C) pH,PCO2 
D) None of the above questions are correct

Exam 11: Respiration During Exercise

Under normal conditions at sea level,the partial pressure of oxygen in the alveoli region of the lung is

According to Fick's law of diffusion,the rate of diffusion of a gas across a tissue is directly proportional to the

Carbon dioxide is transported in arterial blood principally as

Which of the following statements about pulmonary physiology is correct?

In a healthy individual resting at sea level,which of following characteristics of arterial blood are correct?

During resting conditions,the intrapleural pressure is typically lower than the intrapulmonary pressure.

Small changes in arterial PCO2 have a ______________ effect on ventilation compared to small changes in PO2.

At a low PO2,myoglobin has _______________ affinity for O2 than hemoglobin.

A decline in arterial PO2 to 70 mm Hg or below would likely result in

The pulmonary system does not limit VO2 max in elite endurance athletes that exhibit exercise-induced hypoxemia.

The most important muscle of inspiration is/are the

An increase in blood temperature and a decrease in blood pH would result in _____________ in the oxyhemoglobin dissociation curve.

The primary drive to increase ventilation during exercise is due to

Most of the O2 contained in the blood

Research indicates that several months of endurance training results in significant changes in both lung structure and pulmonary function.

A ventilation-perfusion (V/Q)ratio of 0.64 would indicate

An increase in alveolar ventilation (at rest)resulting in hyperventilation will reduce arterial ______and increase______.

Introduction to Exercise Physiology

A: Common Measurements in Exercise Physiology

B: Common Measurements in Exercise Physiology

Control of the Internal Environment

Bioenergetics

Exercise Metabolism

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

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

Small changes in arterial PCO₂ have a ______________ effect on ventilation compared to small changes in PO₂.

At a low PO₂,myoglobin has _______________ affinity for O₂ than hemoglobin.

A decline in arterial PO₂ to 70 mm Hg or below would likely result in

The pulmonary system does not limit VO₂ max in elite endurance athletes that exhibit exercise-induced hypoxemia.

Most of the O₂ contained in the blood

An increase in alveolar ventilation (at rest)resulting in hyperventilation will reduce arterial and increase.