The release of ________ to muscle cell receptors triggers muscle contractions.
1 answer:
Answer:
<em>The release of </em><u><em>acetylcholine</em></u><em> to muscle cell receptors triggers muscle contractions.</em>
Explanation:
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I think the answer is A
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ATP/Energy —- why does this have to be at least 20 characters long lol.
Absorbing other cells gave a competitive advantage.
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Answer:
its B for sure.
Explanation: