Question 1

Discuss changes in the cardiovascular and pulmonary systems that result from conditioning for exercise.

Accepted Answer

Pulmonary ventilation rate increases imm

Question 2

Sabrina's resting heart rate is 80 beats per minute,and her resting stroke volume is 50 mL per beat.What is her cardiac output? When she exercises,her heart rate increases to 100 beats per minute and her stroke volume increases to 55 mL per beat.What happens to her cardiac output? What is the advantage of the lower relative increase in stroke volume?

Accepted Answer

CO = HR × SV.CO = 80 beats/min × 50 mL/b

Question 3

When the muscle has used up its stored ATP and glucose but continues to have a plentiful supply of oxygen,which process will it turn to next to produce more energy for muscle contraction?

Accepted Answer

A)  protein catabolism 
B)  fatty acid oxidation 
C)  fermentation of glucose to lactate 
D)  ketosis 
A)  protein catabolism 
B)  fatty acid oxidation 
C)  fermentation of glucose to lactate 
D)  ketosis

Question 4

Glycolytic metabolism is also known as

Accepted Answer

A)  aerobic metabolism. 
B)  anaerobic metabolism. 
C)  gluconeogenesis. 
D)  glycogenesis. 
E)  beta-oxidation. 
A)  aerobic metabolism. 
B)  anaerobic metabolism. 
C)  gluconeogenesis. 
D)  glycogenesis. 
E)  beta-oxidation.

Question 5

List and discuss the benefits of exercise,especially in regard to decreased risk of cardiovascular disease.

Accepted Answer

Benefits include decreased sys

Question 6

Explain the advantages and disadvantages of glycolytic metabolism.

Accepted Answer

An advantage to glycolytic metabolism is

Question 7

During exercise,skeletal muscle receives approximately ________% of blood flow.Where is this blood redistributed from?

Accepted Answer

88%; this blood is r

Question 8

In addition to the number and type of muscle fibers in a muscle,peak athletic performance requires

Accepted Answer

A)  a good blood supply and system of blood delivery. 
B)  a well-developed respiratory system. 
C)  adequate numbers of muscle mitochondria. 
D)  good supplies of nutrients. 
E)  All of the answers are correct. 
A)  a good blood supply and system of blood delivery. 
B)  a well-developed respiratory system. 
C)  adequate numbers of muscle mitochondria. 
D)  good supplies of nutrients. 
E)  All of the answers are correct.

Question 9

During the first 15 seconds of intense exercise,such as sprinting or power lifting,most of the energy is provided by

Accepted Answer

A)  fat oxidation. 
B)  carbohydrate oxidation. 
C)  ATP in muscle fiber. 
D)  phosphocreatine. 
E)  ATP in muscle fiber and phosphocreatine. 
A)  fat oxidation. 
B)  carbohydrate oxidation. 
C)  ATP in muscle fiber. 
D)  phosphocreatine. 
E)  ATP in muscle fiber and phosphocreatine.

Question 10

During exercise,skeletal muscle

Accepted Answer

A)  vasodilation decreases peripheral resistance to blood flow. 
B)  vasodilation increases peripheral resistance to blood flow. 
C)  vasoconstriction decreases peripheral resistance to blood flow. 
D)  vasoconstriction increases peripheral resistance to blood flow. 
E)  None of the answers are correct. 
A)  vasodilation decreases peripheral resistance to blood flow. 
B)  vasodilation increases peripheral resistance to blood flow. 
C)  vasoconstriction decreases peripheral resistance to blood flow. 
D)  vasoconstriction increases peripheral resistance to blood flow. 
E)  None of the answers are correct.

Question 11

Exercise hyperventilation results from signals from

Accepted Answer

A)  muscle and joint mechanoreceptors and proprioceptors only. 
B)  the carotid body chemoreceptors only. 
C)  activating pulmonary stretch receptors only. 
D)  muscle and joint mechanoreceptors and proprioceptors and from the carotid body chemoreceptors. 
E)  muscle and joint mechanoreceptors and proprioceptors, the carotid body chemoreceptors, and activating pulmonary stretch receptors. 
A)  muscle and joint mechanoreceptors and proprioceptors only. 
B)  the carotid body chemoreceptors only. 
C)  activating pulmonary stretch receptors only. 
D)  muscle and joint mechanoreceptors and proprioceptors and from the carotid body chemoreceptors. 
E)  muscle and joint mechanoreceptors and proprioceptors, the carotid body chemoreceptors, and activating pulmonary stretch receptors.

Question 12

How does exercise hyperventilation maintain nearly normal PO2 and PCO2?

Accepted Answer

Exercise hyperventilation invo

Question 13

Redistribution of blood flow during exercise results from

Accepted Answer

A)  vasodilation only. 
B)  vasoconstriction only. 
C)  vasodilation in skeletal muscle and vasoconstriction in viscera. 
D)  vasoconstriction in skeletal muscle and vasodilation in viscera. 
A)  vasodilation only. 
B)  vasoconstriction only. 
C)  vasodilation in skeletal muscle and vasoconstriction in viscera. 
D)  vasoconstriction in skeletal muscle and vasodilation in viscera.

Question 14

Match the response to the description.
-percent fat metabolized for ATP production as exercise intensity increases

Accepted Answer

A) increase 
B) decrease 
C) no change 
A) increase 
B) decrease 
C) no change

Question 15

The maximal rate of consumption of ________ is used as a measurement of a person's ability to perform endurance exercise and is measured in what units? How is this molecule related to metabolism?

Accepted Answer

Oxygen,measured in liters cons

Question 16

Which of the following best explains why exercise can help reduce the necessity for insulin use in people with type II diabetes mellitus?

Accepted Answer

A)  Exercise upregulates insulin receptors. 
B)  Exercise uses up blood sugar before its levels can become elevated. 
C)  Exercise reduces cortisol levels. 
D)  Exercise doesn't help type II diabetes. 
A)  Exercise upregulates insulin receptors. 
B)  Exercise uses up blood sugar before its levels can become elevated. 
C)  Exercise reduces cortisol levels. 
D)  Exercise doesn't help type II diabetes.

Question 17

Which of the following hormones increase(s)in concentration in the plasma during exercise?

Accepted Answer

A)  cortisol 
B)  catecholamines 
C)  insulin 
D)  cortisol and catecholamines 
E)  cortisol, catecholamines, and insulin 
A)  cortisol 
B)  catecholamines 
C)  insulin 
D)  cortisol and catecholamines 
E)  cortisol, catecholamines, and insulin

Question 18

Dehydration causes

Accepted Answer

A)  fluid to shift from the ECF to the ICF. 
B)  decreased secretion of ADH. 
C)  increased thirst. 
D)  increased levels of aldosterone. 
E)  All of the answers are correct. 
A)  fluid to shift from the ECF to the ICF. 
B)  decreased secretion of ADH. 
C)  increased thirst. 
D)  increased levels of aldosterone. 
E)  All of the answers are correct.

Question 19

Why and how does intracellular K+ become depleted with exercise?

Accepted Answer

Potassium exits nerve and musc

Question 20

Athletes with chronic energy deficit (energy output > energy intake)tend to have high levels of cortisol.Do you expect their immune systems would be better than those who are sedentary? Explain.

Accepted Answer

People who exercise moderately have bett

Exam 25: Integrative Physiology III: Exercise

Discuss changes in the cardiovascular and pulmonary systems that result from conditioning for exercise.

When the muscle has used up its stored ATP and glucose but continues to have a plentiful supply of oxygen,which process will it turn to next to produce more energy for muscle contraction?

Glycolytic metabolism is also known as

List and discuss the benefits of exercise,especially in regard to decreased risk of cardiovascular disease.

Explain the advantages and disadvantages of glycolytic metabolism.

During exercise,skeletal muscle receives approximately ________% of blood flow.Where is this blood redistributed from?

In addition to the number and type of muscle fibers in a muscle,peak athletic performance requires

During the first 15 seconds of intense exercise,such as sprinting or power lifting,most of the energy is provided by

During exercise,skeletal muscle

Exercise hyperventilation results from signals from

How does exercise hyperventilation maintain nearly normal PO2 and PCO2?

Redistribution of blood flow during exercise results from

Match the response to the description. -percent fat metabolized for ATP production as exercise intensity increases

The maximal rate of consumption of ________ is used as a measurement of a person's ability to perform endurance exercise and is measured in what units? How is this molecule related to metabolism?

Which of the following best explains why exercise can help reduce the necessity for insulin use in people with type II diabetes mellitus?

Which of the following hormones increase(s)in concentration in the plasma during exercise?

Dehydration causes

Why and how does intracellular K+ become depleted with exercise?

Athletes with chronic energy deficit (energy output > energy intake)tend to have high levels of cortisol.Do you expect their immune systems would be better than those who are sedentary? Explain.

Introduction to Physiology

Molecular Interactions

Compartmentation: Cells and Tissues

Energy and Cellular Metabolism

Membrane Dynamics

Communication, Integration, and Homeostasis

Introduction to the Endocrine System

Neurons: Cellular and Network Properties

The Central Nervous System

Sensory Physiology

Efferent Division: Autonomic and Somatic Motor Control

Muscles

Integrative Physiology I: Control of Body Movement

Cardiovascular Physiology

Blood Flow and the Control of Blood Pressure

Blood

Mechanics of Breathing

Gas Exchange and Transport

The Kidneys

Integrative Physiology II: Fluid and Electrolyte Balance

The Digestive System

Metabolism and Energy Balance

Endocrine Control of Growth and Metabolism

The Immune System

Reproduction and Development

Filters

How does exercise hyperventilation maintain nearly normal P_O₂ and P_CO₂?

Why and how does intracellular K⁺ become depleted with exercise?