Question

The rate of heart beat is determined by

Answer 1

Heartbeat:

Heartbeat is defined as the sound that is created due to the movement of the heart as it transports the blood to the entire body.

Rate of Heartbeat:

1. The rate of heartbeat is determined by a structure present in the heart known as the SA node.
2. The SA or the Sino-atrial node is the pacemaker of the heart.
3. It helps in the generation of electrical impulses in the heart that cause the contraction of the upper chambers present in the heart.
4. The rate at which this SA node releases the electrical impulses determines the heart rate.