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You can BLOCK the DECREASE in heart rate following parasympathetic nervous system activation with an intravenous...

You can BLOCK the DECREASE in heart rate following parasympathetic nervous system activation with an intravenous injection of

a) a nicotinic acetylcholine receptor antagonist
b) a muscarinic acetylcholine receptor antagonist
c) an adrenergic receptor antagonist
d) either A or B
e)

either A or C

I think the answer is d or e
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Answer #1

The correct answer is : b) a muscarinic acetylcholine receptor antagonist.

Reason:A muscarinic acetylcholine receceptor antagonist such as atropine will increase the heart rate thus reducing heart block.

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