Briefly define 1) Starling’s Law of the heart, 2) the basic cellular mechanism thought to mediate this response, and 3) the physiological significance of this effect.

Answered: Briefly define 1) Starling’s Law of the…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Question

Briefly define 1) Starling’s Law of the heart, 2) the basic cellular mechanism thought to mediate this response, and 3) the physiological significance of this effect.

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Step 1

Introduction:

When at rest, the heart pumps between 4 and 6 liters of blood every minute. During strenuous physical activity, the heart may be demanded to pump four to seven times this volume. The volume pumped by the heart is primarily regulated by (1) intrinsic cardiac regulation of pumping in response to variations in blood volume entering the heart and (2) autonomic nervous system control of heart rate as well as the strength of heart pumping.