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Q.

Which of the following structure produces the maximum number of action potentials per minute?

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An Intiative by Sri Chaitanya

a

Purkinje fibres

b

Bundle of His

c

AV node

d

SA node

answer is D.

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Detailed Solution

Sino-atrial node (SAN) generates the maximum number of action protentials per minute (70-75/min) and therefore, it sets the pace of the activities of the heart.
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