Breathing rate in humans at rest is _.
Correct answer: C. 12 to 16 times per minute
- A. 6 to 10 times per minute
- B. 10 to 14 times per minute
- C. 12 to 16 times per minute
- D. 15 to 20 times per minute
Explanation
Normal breathing rates for an adult person at rest range from 12 to 16 breaths per minute. Any person having breathing rate below 12 or above 20 is considered abnormal. So, option C is correct.
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About Human Respiratory System
The human respiratory system conducts air to the alveoli, where oxygen and carbon dioxide exchange occurs across thin respiratory surfaces. Questions cover the nasal passage, trachea, bronchi, lungs, diaphragm and intercostal muscles, ventilation mechanics and gas transport, while distinguishing breathing and gaseous exchange from cellular respiration.
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