Human Biology, 14 Edition

Published by McGraw-Hill Education
ISBN 10: 1-25924-574-8
ISBN 13: 978-1-25924-574-9

Chapter 13 - Section 13.2 - Skeletal Muscle Fiber Contraction - Check Your Progress - Page 270: 3

Answer

During a muscle contraction, calcium will bind to troponin, which exposes myosin binding sites. The myosin then uses ATP to pull actin to the center of the sarcomere.

Work Step by Step

During a muscle contraction, calcium will bind to troponin, which exposes myosin binding sites. The myosin then uses ATP to pull actin to the center of the sarcomere.
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