Explanation A fast run is a sign of physical activity. Any type of locomotion in an intense manner tends to stimulate the SNS (sympathetic nervous system) of the body. Activation of the sympathetic nervous system leads to an increase in the HR. The heart rate is increased as the number of beats per minute increases from the normal value...

6th Edition

ISBN: 9780134156415

Author: Elaine N. Marieb, Katja N. Hoehn

Publisher: PEARSON

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Question

Chapter 17.7, Problem 17CYU

Summary Introduction

To review:

The reason for the increased HR (heart rate) and SV (stroke volume) after running fast for a while.

Introduction:

Heart rate is defined as the number of times the heart beats in a unit time. A normal person should have a heart rate between 60 to 100 BPM (beats per minute). The SV is defined as the amount of blood whichis pumped out through the ventricle after a contraction. The normal person should have the SV of 50mL (milliliters) to 120mL.

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Chapter 17.6, Problem 16CYU

Chapter 17.7, Problem 18CYU

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Chapter 17 Solutions

Anatomy & Physiology (6th Edition)

Ch. 17.1 - The heart is in the mediastinum. Just what is the...Ch. 17.1 - From inside to outside, list the layers of the...Ch. 17.1 - What is the purpose of the serous fluid inside the...Ch. 17.2 - What is the function of the papillary muscles and...Ch. 17.2 - Prob. 5CYU Ch. 17.3 - Which side of the heart acts as the pulmonary...Ch. 17.3 - Which of the following statements are true? (a)...Ch. 17.3 - Prob. 8CYU Ch. 17.4 - For each of the following, state whether it...Ch. 17.5 - Cardiac muscle cannot go into tetany. Why?

Ch. 17.5 - Which part of the intrinsic conduction system...Ch. 17.5 - Describe the electrical event in the heart that...Ch. 17.5 - MAKING connections Below are drawings of three...Ch. 17.6 - The second heart sound is associated with the...Ch. 17.6 - If the mitral valve were insufficient, would you...Ch. 17.6 - During the cardiac cycle, there are two periods...Ch. 17.7 - Prob. 17CYU Ch. 17.7 - What problem of cardiac output might ensue if the...Ch. 17 - When the semilunar valves are open, which of the...Ch. 17 - The portion of the intrinsic conduction system...Ch. 17 - An ECG provides information about (a) cardiac...Ch. 17 - The sequence of contraction of the heart chambers...Ch. 17 - The fact that the left ventricular wall is thicker...Ch. 17 - Prob. 6MC Ch. 17 - In the heart, which of the following apply? (1)...Ch. 17 - The activity of the heart depends on intrinsic...Ch. 17 - Freshly oxygenated blood is first received by the...Ch. 17 - Describe the location and position of the heart in...Ch. 17 - Describe the pericardium and distinguish between...Ch. 17 - Trace one drop of blood from the time it enters...Ch. 17 - (a) Describe how heart contraction and relaxation...Ch. 17 - The refractory period of cardiac muscle is much...Ch. 17 - (a) Name the elements of the intrinsic conduction...Ch. 17 - Draw a normal ECG pattern. Label and explain the...Ch. 17 - Define cardiac cycle, and follow the events of one...Ch. 17 - What is cardiac output, and how is it calculated?Ch. 17 - Discuss how the Frank-Starling law of the heart...Ch. 17 - Prob. 1CCS Ch. 17 - Prob. 2CCS Ch. 17 - Prob. 3CCS Ch. 17 - Prob. 4CCS Ch. 17 - Prob. 5CCS Ch. 17 - Prob. 6CCS

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Solution Summary: The author analyzes the reason for increased heart rate and stroke volume after running fast for a while.

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