Question

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 molecule

Answer 1

Axons must release signalling molecules (neurotransmitters) which tell the muscle to contract , and muscles should have receptors which can bind to that signalling molecule . So then which one do you think should be the answer ?

Answer 2

C?

Answer 3

bingo ! that's right.

Answer 4

Thanks!

Answer 5

welcome !