Parasympathetic Effects Are Localized and Short-Lived Because

question 118

Multiple Choice

Parasympathetic effects are localized and short-lived because

• A) muscarinic receptors are deactivated by norepinephrine.
• B) acetylcholine is inactivated at the synapse by acetylcholinesterase.
• C) norepinephrine hyperpolarizes the postganglionic membrane.
• D) norepinephrine is inactivated at the synapse by monoamine oxidase.
• E) epinephrine blocks the muscarinic receptors.

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