Which Statement About Autonomic Nervous System Control of a Mammalian

question 121

Multiple Choice

Which statement about autonomic nervous system control of a mammalian heartbeat is false?

• A) Acetylcholine is a parasympathetic neurotransmitter that influences ion channels of pacemaker cells.
• B) The heart slows down in response to acetylcholine.
• C) Acetylcholine increases permeability of Ca²⁺ channels.
• D) Norepinephrine is a sympathetic neurotransmitter that influences ion channels of pacemaker cells.
• E) Acetylcholine increases the permeability of K⁺ channels.

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