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August 31, 2015

Homework Help: Science

Posted by Anonymous on Friday, February 21, 2014 at 2:17pm.

Which of the following must be true about the structures of axons and muscle cells in order for nerve impulses to stimulate muscle contraction?
a- Axons and muscle cells must both have structures that make and secrete the same small molecules.
b- axons and muscle cells must both have receptors that recognize the same small molecules.
c- Axons must have structures that make and secrete molecules, and muscle cells must have receptors that recognize these molecules.
d-Muscle cells must have structures that make and secrete molecules, and axons must have receptors that recognize these molecules.

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