Lesson: Chapter 6 — Human body processes

Heartbeat, blood pressure and lymph 1 of 5 Reset answers

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Question 1

How many times a minute does a resting adult's heart beat?

A About 20 B About 72 C About 150 D About 7

The right answer is the one marked above.

About 72. Each beat, one heart cycle, lasts about 0.8 s.

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