All of the Following Statements Regarding the Actions and Inactivation

question 24

Multiple Choice

All of the following statements regarding the actions and inactivation of acetylcholine are true EXCEPT which one?

• A) acetylcholine is inactivated by a reuptake mechanism operating in the presynaptic terminus.
• B) acetylcholine is the neurotransmitter for the preganglionic neurons of the autonomic nervous system.
• C) Postganglionic acetylcholine receptors are classified pharmacologically as either nicotinic or muscarinic.
• D) acetylcholine is inactivated by hydrolysis by acetylcholinesterase.
• E) Following synthesis in the presynaptic terminal, approximately one-half of the acetylcholine remains free in the cytoplasm.

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