RE-NEET2026Zoology-Human Physiology
RE-NEET 2026 Zoology Cardiovascular System MCQ Question
Type: MCQ-fact-Easy-Class 11
The number of action potentials generated by sino-arterial node (SAN) in a healthy human is _______ per minute.
A
70 - 75
B
100 - 110
C
120 - 140
D
28 - 30
Correct Answer
Option A
Detailed Explanation
The sino-arterial node typically generates 70-75 action potentials per minute in a healthy human, corresponding to the normal resting heart rate.
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