Human Anatomy & Physiology (9th Edition)

Published by Pearson
ISBN 10: 0321743261
ISBN 13: 978-0-32174-326-8

Chapter 9 - Muscles and Muscle Tissue - Review Questions - Critical Thinking and Clinical Application Questions - Page 318: 3

Answer

Chemical A. By blocking binding of ACh to the motor end plate, neural stimulation of the cell is blocked, and the muscle cell cannot depolarize. Chemical B would actually increase contraction of the muscle cell by increasing the availability of calcium ions that bind to troponin, contributing to actin-myosin cross bridging.

Work Step by Step

Chemical A. By blocking binding of ACh to the motor end plate, neural stimulation of the cell is blocked, and the muscle cell cannot depolarize. Chemical B would actually increase contraction of the muscle cell by increasing the availability of calcium ions that bind to troponin, contributing to actin-myosin cross bridging.
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