Life: The Science of Biology 11th Edition

Published by W. H. Freeman
ISBN 10: 1-31901-016-4
ISBN 13: 978-1-31901-016-4

Chapter 47 - Musculoskeletal Systems - 47.1 - Interactions of Actin and Myosin Cause Muscles to Contact - 47.1 Recap - Learning Outcomes - Page 1008: 2

Answer

When an incoming action potential activates the DHP receptor, the protein changes its conformation to allow calcium ions to flow from the sarcoplasmic reticulum to the sarcoplasm through the ryanodine receptor. The calcium ion diffusion triggers the interaction of actin and myosin, as well as the sliding of the filaments.

Work Step by Step

When an incoming action potential activates the DHP receptor, the protein changes its conformation to allow calcium ions to flow from the sarcoplasmic reticulum to the sarcoplasm through the ryanodyne receptor. The calcium ion diffusion triggers the interaction of actin and myosin, as well as the sliding of the filaments.
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