Question

Pacemaker of heart is

• A. AV node
• B. SA node
• C. SV node
• D. Tricuspid valve

Answer 1

The correct option is B

SA node

The correct answer is B:

SA node:

1. It is a cluster of cells located in the upper chamber of the heart.
2. It generates an electrical or cardiac impulse and causes contraction in the heart.
3. It is also known as a pacemaker of the heart.

Option A:

AV mode helps in the transportation of impulses received from the SA node.

Option D:

1. The tricuspid valve is located between the right atrium and ventricle.
2. It helps inflowing of blood into the heart.