Question

Pacemaker of heart is:

• A. SA node
• B. AV node
• C. Bundle of His
• D. Purkinje fibres

Answer 1

The correct option is A SA node

• The sino-atrial (SA) node is a group of specialised nerve cells that is responsible for generating electrical impulses for the heart to beat.
• The electrical impulse generated by the SA node allows the heart to contract.
• It is the natural pacemaker of the heart.

So, the correct answer is 'SA node'.