
Concept explainers
To discuss: What happens to each of the following to allow for skeletal muscle relaxation: ACh, action potential, Ca2+ concentration in sarcoplasm, and troponin–tropomyosin complex.
Concept introduction: During skeletal muscle contraction, a motor neuron stimulates the skeletal muscle fibers. The stimulation of skeletal muscle fibers ultimately causes the interaction between the myofilaments within the skeletal muscle fibers to produce a surface tension between the muscles. The initial step in the relaxation of skeletal muscle is the termination of the nerves signals propagated along the motor neuron. When the signal from the nerve stops, then there is no additional release of acetylcholine.

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Chapter 10 Solutions
Loose Leaf For Anatomy & Physiology: An Integrative Approach
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