Biological Science (6th Edition)

Published by Benjamin Cummings
ISBN 10: 0321976495
ISBN 13: 978-0-32197-649-9

Chapter 45 - Animal Movement - Review - Page 959: 2

Answer

D

Work Step by Step

Contraction occurs when myosin moves down the actin with the expense of energy. Calcium binds to the troponin-tropomyosin complex, allowing the myosin to bond with the actin. Therefor, both calcium ions and ATP must be available in adequate supply.
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