Human Physiology: An Integrated Approach (8th Edition)
Human Physiology: An Integrated Approach (8th Edition)
8th Edition
ISBN: 9780134605197
Author: Dee Unglaub Silverthorn
Publisher: PEARSON
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Chapter 25, Problem 20RQ
Summary Introduction

To determine: The cardiac output provided heart rate is 60 beats/minute, and the stroke volume is 70 mL/beat.

Introduction: Cardiac output is the volume of blood pumped by the heart per minute. It tells us the capacity of the atrium and ventricles. The normal cardiac output of an adult man is 4.7 liters of blood per minute.

Summary Introduction

To determine: The cardiac output if the heartbeat increases to 120 beats/min during exercise.

Introduction: The stroke volume is the amount of blood pumped by the left ventricle in one contraction. The stroke volume can be calculated by subtracting end systolic volume from end diastolic volume.

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Consider the equation cardiac output (CO) = stroke volume (SV) X heart rate Which of the following changes would increase cardiac output? Group of answer choices An increase in afterload An increase in EDV A decrease in ventricle contractility An increase in parasympathetic system stimulation of the SA node
If cardiac output is 16L/min during jogging, and 25% of total blood flow is being diverted to skeletal muscle, how much blood is being delivered to skeletal muscle in L/min?   a. 2 b. 5 c. 6 d. 1 e. 4 f. 3
What is the cardiac output of a person with a resting stroke volume of 60 mL and a heartbeat of 80 bpm. (BONUS: Is the calculated cardiac output normal or abnormal?)
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