Question

The breathing rate in humans under normal condition is

• A. 16 - 18 times
• B. 20 - 25 times
• C. 39 - 32 times
• D. 18 - 20 times

Answer 1

The correct option is A

16 - 18 times

The correct option is A:

Explanation of the correct option:

1. Breathing rate is defined as the number of breaths taken by an individual per minute.
2. Normal breathing rate of an adult human is about 16 - 18 breaths per minute. It may increase during heavy exercise.

Explanation for incorrect options-

Option B:

1. During heavy exercise, the breathing rate of an individual increases to keep up with the oxygen demand of the body.
2. The breathing rate increases about 20-25 times during vigorous exercising.

Options C and D:

1. Normal breathing rate may increase during heavy exercise as more supply of oxygen is needed in the body.

Final answer: The breathing rate in humans under normal conditions is 16-18 times.