Question

I know this is the wrong subject, but I'm not getting an answer anywhere else.

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.

I put D in another response.

Answer 1

d-Muscle cells must have structures that make and secrete molecules, and axons must have receptors that recognize these molecules.

Answer 2

Its D Muscle cells must have structures that make and secrete molecules, and axons must have receptors that recognize these molecules.

Answer 3

Are you sure?

Answer 4

Yes

Answer 5

Okay, thanks!