BIOLOGY (LL)
BIOLOGY (LL)
5th Edition
ISBN: 9781264115495
Author: BROOKER
Publisher: MCG
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Chapter 53, Problem 5TY
Summary Introduction

Introduction:

The cardiac output is the measure of the volume of the blood pumped by the heart per beat. The number of beats per minute is known as the rate of heartbeat. The total capacity of the heart per minute gives the volume of the blood pumped by the heart per minute.

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What is the cardiac output of a heart when the heartbeat rate is 60 beat.min-1, the diastolic pressure in the aorta is 80 mm Hg, and the stroke volume is 80 mL.beat-1?   A. 4,800 mm Hg.min-1   B. 6,400 mL.mm Hg-1   C. 4,800 mL.min-1   D. 1.33 mL.beat-1   E. 0.75 mL.min-1
During exercise, the stroke volume reaches its peak when the cardiac output is at about what percent of its maximum? A. 30 percent B. 40 percent C. 50 percent D. 60 percent
5 29.At maximal exercise, a recreationally active individual has an a-vO2 difference of 0.16 mL O2/mL of blood, a stroke volume of 122 mL, and a heart rate of 191 bpm. What is their V̇O2max? A. 3960 mL/min B. 4150 mL/min C. 3620 mL/min D. 3730 mL/min
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