Question

3. If one of your friends asked you to explain how body movement occurs,

which of the following steps would not be included in your explanation?
a. Impulses from the nervous system move away from the
neuromuscular junction.
b. The muscle filaments slide across each other and the muscle
shortens, or contracts.
c. The neuron releases a neurotransmitter callèd acetylcholine.
d. Acetylcholine binds to receptors on the muscle and begins a
chemical reaction within its fibers.

Answer 1

Body movement occurs in the neuromuscular junction through steps involving the release of acetylcholine, binding to muscle receptors, and initiating a chemical reaction for muscle contraction.

Step-by-step explanation:

Body movement occurs through a series of steps in the neuromuscular junction. When an impulse from the nervous system reaches the neuromuscular junction, it triggers the release of a neurotransmitter called acetylcholine from the neuron (c). Acetylcholine then binds to receptors on the muscle fibers (d), starting a chemical reaction that leads to the sliding of muscle filaments (b) and the contraction or shortening of the muscle. Therefore, the step that would not be included in the explanation is a. Impulses from the nervous system moving away from the neuromuscular junction.

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