What role do both dopamine and acetylcholine have when they function as excitatory neurotransmitters?

Question

a) They make the postsynaptic membrane more permeable to K+ ions.

b) They make the presynaptic membrane more permeable to K+ ions.

c) They make the presynaptic membrane more permeable to Na+ ions.

d) They make the postsynaptic membrane more permeable to Na+ ions.

I can't find the answer in my textbook anywhere, anyone know?

Answer 1

D) They make the postsynaptic membrane more permeable to Na+ ions.