What is the neurotransmitter used by the parasympathetic nervous system?

Question

What is the neurotransmitter used by the parasympathetic nervous system?

Answer 1

acetylcholine

Answer 2

The parasympathetic nervous system uses acetylcholine (ACh) no others are used. The ACh acts on two types of receptors, the muscarinic and nicotinic cholinergic receptors. Most transmissions occur in two stages: When stimulated, the preganglionic nerve releases ACh at the ganglion, which acts on nicotinic receptors of postganglionic neurons. The postganglionic nerve then releases ACh to stimulate the muscarinic receptors of the target organ.

Answer 3

The parasympathetic nervous system uses only acetylcholine (ACh) as its neurotransmitter.