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: 2

Answer

The reason for the tightness is rigor mortis. The myosin cross bridges are "locked on" to the actin because of the lack of ATP necessary for release. No, peak rigidity occurs at 12 hours and then gradually dissipates over the next 48 to 60 hours as biological molecules begin to degrade.

Work Step by Step

The reason for the tightness is rigor mortis. The myosin cross bridges are "locked on" to the actin because of the lack of ATP necessary for release. No, peak rigidity occurs at 12 hours and then gradually dissipates over the next 48 to 60 hours as biological molecules begin to degrade.
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