Biology 2010 Student Edition

Published by Prentice Hall
ISBN 10: 9780133669510
ISBN 13: 978-0-13366-951-0

Chapter 32, Skeletal, Muscular, and Integumentary Systems - Assessment - 32.2 The Muscular System - Understand Key Concepts - Page 942: 14



Work Step by Step

A neuromuscular junction occurs between the motor neuron and a skeletal muscle cell. Stimulation of the motor neuron causes it to release acetylcholine, which travels across the synapse, initiating an action potential in the muscle cell. The action potential causes calcium ions to be released, which eventually causes the formation of cross-bridges between the myosin and actin filaments.
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