Chapter 19.9, Problem 39WDYL

a.

Summary Introduction

To determine:

If both stroke volume and heart rate increases, cardiac output (a) stays the same, (b) increases, or (c) decreases and to determine whether the relationship between these two variables and cardiac output is inverse or direct.

Concept introduction:

The amount of blood, which is pumped by either ventricle in one minute, is known as “cardiac output” ( $CO$). The unit of cardiac output is liters per minute ( $L/min$).

To determine:

When both stroke volume and heart rate increases, cardiac output stays the same or not.

b.

Summary Introduction

To determine:

When both stroke volume and heart rate increases, cardiac output increases or not.

c.

Summary Introduction

To determine:

When both stroke volume and heart rate increases, cardiac output decreases or not.