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The neurotransmitter(s) associate with autonomic ganglia is (are) _______________.

A) Norepinephrine (NE)
B) Acetylcholine (ACh) and Norepinephrine (NE)
C) Acetylcholine (ACh)
D) Dopamine
E) Dopamine and Norepinephrine (NE)

User Csgroen
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1 Answer

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Final answer:

The neurotransmitters associated with autonomic ganglia are acetylcholine (ACh) and norepinephrine (NE), with ACh released from preganglionic fibers and NE or ACh from postganglionic fibers depending on the target.

Step-by-step explanation:

The neurotransmitter(s) associated with autonomic ganglia are acetylcholine (ACh) and norepinephrine (NE). In the autonomic nervous system, all preganglionic fibers in both the sympathetic and parasympathetic systems release acetylcholine, which binds to nicotinic receptors located on the postganglionic neurons in the ganglia. This results in the depolarization of these neurons. However, the neurotransmitters released by postganglionic neurons differ. Postganglionic parasympathetic fibers release ACh onto muscarinic receptors on their target, whereas most postganglionic sympathetic fibers release norepinephrine, except for fibers that innervate sweat glands and blood vessels associated with skeletal muscles, which release ACh. Therefore, the correct answer to the student's question is B) Acetylcholine (ACh) and Norepinephrine (NE).

User Pratik Deoghare
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