Question

Number of action potentials that can be generated by sino-atrial node is

• A. 40 - 50/min
• B. 70 - 75/min
• C. 80 - 120/min
• D. 100 - 120/min

Answer 1

The correct option is B 70 - 75/min

Sino-atrial node or SA node is a called natural pacemaker of heart as it generates action potential of heart. Number of action potential that can be generated by SA node is 70-75 per minute.

So the correct answer will be option B.