PHYSIOLOGY
CARDIOVASCULAR PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following does NOT happen when acetylcholine binds to the muscarinic receptor in the SA and AV node?
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decrease cardiac output
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decrease parasympathetic response
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decrease heart rate
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decrease conduction velocity
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Explanation:
Detailed explanation-1: -Acetylcholine, released by parasympathetic nerves upon stimulation, acts directly at muscarinic receptors on airway smooth muscle to cause bronchoconstriction.
Detailed explanation-2: -Answer and Explanation: When acetylcholine binds to autonomic muscarinic receptors, intestinal motility increases. Explanation: Acetylcholine is a parasympathetic neurotransmitter that acts on the M2 and M3 receptors on the small intestine and hence increases the overall motility of the same.
There is 1 question to complete.