Asked by JAYYA

What is the meaning of the bold word as it is used in the sentence?

Because blood levels change as the heart pumps blood through the body, the amount of light bouncing back into the monitor allows it to calculate the person’s pulse rate.
To shine light in bursts
The amount someone is breathing
The rhythm of a heartbeat
The speed of one’s thoughts

All Answers 1

Answered by GPT-5 mini AI
The rhythm of a heartbeat.

Explanation: “Pulse rate” refers to how often the heart beats (beats per minute); the monitor uses light changes from blood flow to calculate that.