Which of the following statements about acetylcholine is false?
A) Acetylcholine is a neurotransmitter.
B) Acetylcholine is found at mammalian neuromuscular junctions.
C) Both smooth muscles and skeletal muscles respond to acetylcholine.
D) Acetylcholine is degraded by acetylcholinesterase.
E) Acetylcholine increases contractility of the heart.
Correct Answer:
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