What is the cardiac output at rest and during exercise, and the cardiac reserve if (a) the heart rate is 75 beats per minute and stroke volume is 70 mL at rest, and (b) if the heart rate is 150 beats per minute and stroke volume is 100 mL during exercise?
a.
To determine:
The cardiac output at rest and during exercise, and the cardiac reserve if (a) the heart rate is 75 beats per minute and stroke volume is
Concept introduction:
The amount of blood, which is pumped by either ventricle in one minute, is known as “cardiac output” (
To determine:
The cardiac output at rest and during exercise and the cardiac reserve if the heart rate is 75 beats per minute and stroke volume is
Explanation of Solution
The product of stroke volume and heart rate is called cardiac output. The heart rate (
The cardiac reserve cannot be determined because the body is at rest and has not performed exercise.
b.
To determine: The cardiac output at rest and during exercise and the cardiac reserve if the heart rate is 150 beats per minute and stroke volume is
Explanation of Solution
The product of stroke volume and heart rate is called cardiac output. The heart rate (
The heart rate is
The heart rate is
The “cardiac reserve” is equal to difference of “cardiac output during exercise” and “cardiac output at rest”. The cardiac reserve is calculated as follows:
The cardiac output at rest is
The cardiac output during exercises is
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Chapter 19 Solutions
ANATOMY+PHYSIOLOGY:INTEGRATIVE APP (LL)
- Human Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage LearningAnatomy & PhysiologyBiologyISBN:9781938168130Author:Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark WomblePublisher:OpenStax College