Question

which of the following releases the neurotransmitter norepinephrine?\
a\
cns\
pns\
b\
c\
\\u25cb terminus of a parasympathetic postganglionic neuron\
\\u25cb terminus of a somatic motor neuron\
\\u25cb terminus of a sympathetic preganglionic neuron\
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Explanation:

To determine which neuron releases norepinephrine, we analyze the options:

1. Parasympathetic postganglionic neurons typically release acetylcholine, not norepinephrine.
2. Somatic motor neurons release acetylcholine at the neuromuscular junction.
3. Sympathetic postganglionic neurons (not preganglionic, but the diagram likely corresponds) – wait, the preganglionic sympathetic neurons release acetylcholine, but postganglionic sympathetic (most) release norepinephrine. However, the options here: Wait, the correct structure for norepinephrine release is the postganglionic sympathetic neuron. But among the given options (the neuron diagrams: A is somatic motor (single neuron, CNS to PNS target), B is parasympathetic (two neurons, short postganglionic), C is sympathetic (two neurons, long postganglionic? Wait, no – the key is: Sympathetic postganglionic neurons (except for sweat glands) release norepinephrine. But the options listed (the text options) – wait, the user's text options: "terminus of a parasympathetic postganglionic neuron" (releases ACh), "terminus of a somatic motor neuron" (releases ACh), "terminus of a sympathetic preganglionic neuron" (releases ACh). Wait, maybe there's a missing option, but assuming the diagram: Let's re-express. The correct neuron that releases norepinephrine is the postganglionic sympathetic neuron. But among the diagram options (A, B, C):

• A: Single neuron (somatic motor, CNS to target, releases ACh).
• B: Two neurons, short postganglionic (parasympathetic, releases ACh).
• C: Two neurons, postganglionic (sympathetic, releases NE). So the correct diagram is C, but the text options – wait, the user's text options might have a typo, but assuming the diagram: The neuron labeled C (sympathetic postganglionic) releases norepinephrine.

Answer:

C (the neuron labeled C in the diagram)