Question 1

An increase in blood levels of carbon dioxide results in a decrease in blood pH because an increase in PCO2

Accepted Answer

A) decreases H+ ion levels in the plasma. 
B) promotes an increase in lactic acid production in the muscle. 
C) reacts with water to form carbonic acid,which dissociates to release H+. 
D) none of the above answers are correct. 
A) decreases H+ ion levels in the plasma. 
B) promotes an increase in lactic acid production in the muscle. 
C) reacts with water to form carbonic acid,which dissociates to release H+. 
D) none of the above answers are correct. C

Question 2

The ability of histidine to buffer hydrogen ions is because histidine contains

Accepted Answer

A) an ionizable group 
B) a free carbon atom that accepts hydrogen ions 
C) bicarbonate molecules 
D) None of the above answers are correct 
A) an ionizable group 
B) a free carbon atom that accepts hydrogen ions 
C) bicarbonate molecules 
D) None of the above answers are correct A

Question 3

Metabolic acidosis can result from the overproduction of ketoacids,which can occur

Accepted Answer

A) during exercise. 
B) in uncontrolled diabetes. 
C) as a result of high levels of glucose metabolism. 
D) all of the above answers are correct. 
A) during exercise. 
B) in uncontrolled diabetes. 
C) as a result of high levels of glucose metabolism. 
D) all of the above answers are correct. B

Question 4

Using the Henderson-Hasselbalch equation,calculate the pH of blood given: pKa = 6.1
Blood concentration of carbonic acid = 1.2 mEq/L
Blood concentration of bicarbonate = 24 mEq/L
Your calculation reveals that the pH of blood is

Accepted Answer

A) 7.2 
B) 7.3 
C) 7.4 
D) None of the above answers are correct 
A) 7.2 
B) 7.3 
C) 7.4 
D) None of the above answers are correct

Question 5

Muscle pH is generally

Accepted Answer

A) 0.4-0.6 pH units lower than arterial pH. 
B) 0.4-0.6 pH units higher than arterial pH. 
C) equal to blood pH. 
D) None of the above answers are correct 
A) 0.4-0.6 pH units lower than arterial pH. 
B) 0.4-0.6 pH units higher than arterial pH. 
C) equal to blood pH. 
D) None of the above answers are correct

Question 6

The most common and strongest acid produced in skeletal muscle during heavy exercise is ________________ acid.

Accepted Answer

A) phosphoric 
B) lactic 
C) acetoacetic 
D) citric 
A) phosphoric 
B) lactic 
C) acetoacetic 
D) citric

Question 7

Which of the following is true of the pH of arterial blood?

Accepted Answer

A) The normal pH is 7.0. 
B) A pH of 7.0 would be considered acidosis. 
C) A pH of 7.0 would be considered alkalosis. 
D) None of the above is true. 
A) The normal pH is 7.0. 
B) A pH of 7.0 would be considered acidosis. 
C) A pH of 7.0 would be considered alkalosis. 
D) None of the above is true.

Question 8

An example of a strong base is bicarbonate (HCO3-).

Accepted Answer

A) True 
 B)False

Question 9

Studies reveal that exercise training improves muscle buffering capacity.Which of the following exercise-induced changes is NOT responsible for training-induced improvements in muscle buffering capacity?

Accepted Answer

A) increased levels of carnosine in muscle fibers 
B) increased muscle levels of citrate synthase 
C) increased content of hydrogen ion transporters 
D) None of the above answers are correct 
A) increased levels of carnosine in muscle fibers 
B) increased muscle levels of citrate synthase 
C) increased content of hydrogen ion transporters 
D) None of the above answers are correct

Question 10

The respiratory system works in the regulation of acid-base balance by lowering

Accepted Answer

A) arterial PO2. 
B) arterial PCO2. 
C) blood levels of HCO3. 
D) None of the above answers are correct 
A) arterial PO2. 
B) arterial PCO2. 
C) blood levels of HCO3. 
D) None of the above answers are correct

Question 11

A lack of the enzyme carbonic anhydrase would affect the ability of the body to both buffer the blood and to transport CO2.

Accepted Answer

A) True 
 B)False

Question 12

Sodium bicarbonate has been ingested by athletes in an attempt to improve performance by

Accepted Answer

A) increasing blood buffering capacity. 
B) decreasing muscle lactate production. 
C) stimulating pulmonary ventilation to increase oxygen transport. 
D) increasing plasma volume. 
A) increasing blood buffering capacity. 
B) decreasing muscle lactate production. 
C) stimulating pulmonary ventilation to increase oxygen transport. 
D) increasing plasma volume.

Question 13

Which of the following plays an important role in acid-base balance during exercise?

Accepted Answer

A) respiratory system 
B) kidneys 
C) increased production of bicarbonate in white blood cells 
D) None of the above answers are correct 
A) respiratory system 
B) kidneys 
C) increased production of bicarbonate in white blood cells 
D) None of the above answers are correct

Question 14

The first line of defense in protecting against pH change during exercise is

Accepted Answer

A) sodium bicarbonate levels in the blood. 
B) hemoglobin levels in the blood. 
C) intracellular buffers. 
D) plasma bicarbonate. 
A) sodium bicarbonate levels in the blood. 
B) hemoglobin levels in the blood. 
C) intracellular buffers. 
D) plasma bicarbonate.

Question 15

The bicarbonate buffer system is involved in both intracellular buffering and blood buffering of hydrogen ions.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following transporters in skeletal muscles are responsible for moving hydrogen ions across the sarcolemma?

Accepted Answer

A) sodium-hydrogen exchanger 
B) monocarboxylate transporter 
C) lactate transporter 
D) Both A and B are correct 
A) sodium-hydrogen exchanger 
B) monocarboxylate transporter 
C) lactate transporter 
D) Both A and B are correct

Question 17

The most important of the blood buffers is/are

Accepted Answer

A) bicarbonate. 
B) blood proteins. 
C) hemoglobin. 
D) platelets. 
A) bicarbonate. 
B) blood proteins. 
C) hemoglobin. 
D) platelets.

Question 18

Which of the following track running events would have the greatest risk of acid-base disturbance?

Accepted Answer

A) marathon 
B) 100 meter sprint 
C) 800 meter run 
D) 10,000 meter run 
A) marathon 
B) 100 meter sprint 
C) 800 meter run 
D) 10,000 meter run

Question 19

Acids are defined as

Accepted Answer

A) molecules that release hydroxyl ions (OH-). 
B) molecules that release hydrogen ions (H+). 
C) molecules that combine with hydrogen ions. 
D) substances that raise the bicarbonate ion concentration of the solution. 
A) molecules that release hydroxyl ions (OH-). 
B) molecules that release hydrogen ions (H+). 
C) molecules that combine with hydrogen ions. 
D) substances that raise the bicarbonate ion concentration of the solution.

Question 20

Hyperventilation at rest can result in ___________ due to ____________.

Accepted Answer

A) metabolic acidosis;increased blood levels of lactic acid 
B) respiratory acidosis;increasing blood levels of carbon dioxide 
C) alkalosis;decreased blood levels of carbon dioxide 
D) None of the above answers are correct 
A) metabolic acidosis;increased blood levels of lactic acid 
B) respiratory acidosis;increasing blood levels of carbon dioxide 
C) alkalosis;decreased blood levels of carbon dioxide 
D) None of the above answers are correct

Exam 12: Acid-Base Balance

An increase in blood levels of carbon dioxide results in a decrease in blood pH because an increase in PCO2

The ability of histidine to buffer hydrogen ions is because histidine contains

Metabolic acidosis can result from the overproduction of ketoacids,which can occur

Using the Henderson-Hasselbalch equation,calculate the pH of blood given: pKa = 6.1 Blood concentration of carbonic acid = 1.2 mEq/L Blood concentration of bicarbonate = 24 mEq/L Your calculation reveals that the pH of blood is

Muscle pH is generally

The most common and strongest acid produced in skeletal muscle during heavy exercise is ________________ acid.

Which of the following is true of the pH of arterial blood?

An example of a strong base is bicarbonate (HCO3-).

Studies reveal that exercise training improves muscle buffering capacity.Which of the following exercise-induced changes is NOT responsible for training-induced improvements in muscle buffering capacity?

The respiratory system works in the regulation of acid-base balance by lowering

A lack of the enzyme carbonic anhydrase would affect the ability of the body to both buffer the blood and to transport CO2.

Sodium bicarbonate has been ingested by athletes in an attempt to improve performance by

Which of the following plays an important role in acid-base balance during exercise?

The first line of defense in protecting against pH change during exercise is

The bicarbonate buffer system is involved in both intracellular buffering and blood buffering of hydrogen ions.

Which of the following transporters in skeletal muscles are responsible for moving hydrogen ions across the sarcolemma?

The most important of the blood buffers is/are

Which of the following track running events would have the greatest risk of acid-base disturbance?

Acids are defined as

Hyperventilation at rest can result in ___________ due to ____________.

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

Respiration During Exercise

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

An increase in blood levels of carbon dioxide results in a decrease in blood pH because an increase in PCO₂

An example of a strong base is bicarbonate (HCO₃^-).

A lack of the enzyme carbonic anhydrase would affect the ability of the body to both buffer the blood and to transport CO₂.

Hyperventilation at rest can result in _ due to __.