HISTOLOGY
BLOOD VESSELS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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(Maliyah) How many times does the SA node generate impulses a minute?
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50 times/minute
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65 times/minute
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75 times/minute
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45 times/minute
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Explanation:
Detailed explanation-1: -The SA node comprises specialized cells that undergo spontaneous generation of action potentials at a rate of 100-110 action potentials ("beats") per minute.
Detailed explanation-2: -Answer and Explanation: The average heart rate is considered to be low when compared to the ability of the sinoatrial node to creating action potentials. This is because of the parasympathetic nervous system and the vagus nerve.
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