What are the two types of receptors found in the parasympathetic system?

Inhibition of acetylcholinesterase by poisoning blocks neurotransmission at the neuromuscular junction because

a. ACh is no longer released by the presynaptic terminal.

b. ACh synthesis in the presynaptic terminal is blocked.

c. ACh is not degraded, so prolonged depolarization is enforced on the postsynaptic cell.

d. ACh is blocked from attaching to the postsynaptic ACh receptors.

The effects of neurotransmitter binding are very brief. Explain.

___________ and ___________ are the major neurotransmitters released by autonomic nervous system neurons.

The neurotransmitter released at all synapses in the parasympathetic division is: