Anatomy & Physiology: The Unity of Form and Function, 7th Edition

Published by McGraw-Hill Education
ISBN 10: 0073403717
ISBN 13: 978-0-07340-371-7

Chapter 19 - The Circulatory System: The Heart - Study Guide - True or False - Page 742: 9

Answer

True

Work Step by Step

Ventricular cardiocytes have a stable resting membrane potential (-90mV) but myocytes of the SA node do not. Cardiocytes only depolarize when stimulated. The myocytes of the SA node do not have a stable resting membrane potential, instead their membrane potential drifts upwards, resulting in spontaneously firing at regular intervals.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.

GradeSaver will pay $15 for your literature essays
GradeSaver will pay $25 for your college application essays
GradeSaver will pay $50 for your graduate school essays – Law, Business, or Medical
GradeSaver will pay $10 for your Community Note contributions
GradeSaver will pay $500 for your Textbook Answer contributions