40.Using the answer code on the right, match the description with the autonomic neurotransmitter. Neurotransmitter may be used more than once.1) secreted by preganglionic fibers2) secreted by sympathetic postganglionic fibers3) secreted by parasympathetic postganglionic fibers4) secreted by the adrenal medulla5) secreted by somatic motor neurons6) binds to muscarinic or nicotinic receptors7) binds to α or badrenergic receptorsA. acetylcholineB. dopamineC. GABAD. norepinephrine/epinephrine

Explanation:

Autonomic neurotransmitters are the chemicals that are involved in the transmission of the neural signals in tne autonomic nervous system .The autonomic nervous system consist of the sympathetic (adrenergic)and parasympathetic (cholinergic)system and the receptors are alpha,beta and muscarinic ,nicotinic respectively. These receptors are found at various sites and elicit a variety of actions in the body. The main neurotransmitter of the adrenergic system is the epinephrine or non epinephrine and for the cholinergic system is acetylcholine.

All preganglionic neurons use ACh as the neurotransmitter

With the mentioned details :

check attach files

answer; i believe that the correct answer is (light);

substitution is the answer in this case