Question

What neurotransmitters are used at the preganglionic sympathetic

nerve terminal? Postganglionic? What types of receptors are present
at the two locations? What is the exception to this
neurotransmitte

Answer 1

The neurotransmitters used at the preganglionic sympathetic nerve terminal are acetylcholine (ACh). The neurotransmitters used at the postganglionic sympathetic nerve terminal are norepinephrine, with an exception for sweat glands and blood vessels associated with skeletal muscles which release ACh.

Step-by-step explanation:

The neurotransmitters used at the preganglionic sympathetic nerve terminal are acetylcholine (ACh). The neurotransmitters used at the postganglionic sympathetic nerve terminal are norepinephrine, with an exception for sweat glands and blood vessels associated with skeletal muscles which release ACh. The receptors present at the preganglionic and postganglionic sympathetic nerve terminals are nicotinic receptors and adrenergic receptors, respectively. The exception to the neurotransmitter is that some postganglionic sympathetic fibers release ACh instead of norepinephrine.