BuyFindarrow_forward

Cardiopulmonary Anatomy & Physiolo...

7th Edition
Des Jardins + 1 other
ISBN: 9781337794909

Solutions

Chapter
Section
BuyFindarrow_forward

Cardiopulmonary Anatomy & Physiolo...

7th Edition
Des Jardins + 1 other
ISBN: 9781337794909
Textbook Problem

Which of the following increases an individual's cardiac output?

1. Epinephrine

2. Hypovolemia

3. Mechanical ventilation

4. Hyperthermia

A. 1 only

B. 2 only

C. 3 only

D. 1 and 4 only

Summary Introduction

Introduction:

The cardiac output in an individual represents the amount of blood that can be pumped by the heart in a minute. The cardiac output of a healthy individual ranges from 4500-8000 mL/min. It depends on both, the stroke volume (amount of blood pumped by the heart in each contraction) and the heart rate (number of times the heart beats in a minute). The cardiac output is altered by a change in the stroke volume caused by various physiological conditions and drug intake.

Explanation

Justifications/ Explanations for the correct answer:

Option (d) is given as 1 and 4 only. Epinephrine is a positive inotropic drug produced by medulla that can increase the contractibility of the heart muscles by the means of vasoconstriction. This will lead to an increase in the stroke volume and thus, the cardiac output is also increased.

Hyperthermia is an abnormal condition of the human body that leads to extremely high temperature. It is caused by the failure of the thermoregulatory system to maintain physiological temperature. The increase in temperature increases the blood flow that ultimately leads to an increase in the stroke volume. Thus, cardiac output is also increased. Hence, option (d) is correct.

Explanation for the incorrect answer:

Option (a) is given as 1 only. Epinephrine is a sympathomimetic hormone produced by the medulla that can stimulate the rhythmic contractions of the heart by the means of vasoconstriction...

Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Additional Science Solutions

Find more solutions based on key concepts

Show solutions add

Under certain circumstances, amino acids can be converted to glucose and so serve the energy needs of the brain...

Nutrition: Concepts and Controversies - Standalone book (MindTap Course List)

How do eating disorders affect health?

Understanding Nutrition (MindTap Course List)

Describe the process of bioremediation.

Biology (MindTap Course List)

0 Complete the equations for these reactions.

Introduction to General, Organic and Biochemistry

. state the third law of thermodynamics.

Chemistry for Engineering Students

What distinguishes an element from a compound? Can a compound also be an element?

General Chemistry - Standalone book (MindTap Course List)

The position of a particle moving under uniform acceleration is some function of time and the acceleration. Sup...

Physics for Scientists and Engineers, Technology Update (No access codes included)