MCAT Biology Question 55: Answer and Explanation
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Question: 55
10. Which of the following neurotransmitters is used in the ganglia of both the sympathetic and parasympathetic nervous systems?
- A. Acetylcholine
- B. Dopamine
- C. Norepinephrine
- D. Serotonin
Correct Answer: A
Explanation:
Acetylcholine is the neurotransmitter released by the preganglionic neuron in both the sympathetic and parasympathetic nervous systems. The postganglionic neuron in the sympathetic nervous system usually releases norepinephrine, while the postganglionic neuron in the parasympathetic nervous system releases acetylcholine.