What is the residual volume of air which always remains inside the lungs of human?
Correct answer: D. 1.5 Liters
- A. 3.5 Liters
- B. 0.5 Liters
- C. 5.0 Liters
- D. 1.5 Liters
Explanation
Residual volume is the amount of air that always remains inside the lungs even after a person has forcefully exhaled as much air as possible. This air is important to keep the lungs open and prevent collapse. The residual volume of air in human lungs is typically around 1.5 liters, which is almost one-third of the total lung capacity.
This question appeared on the UHS MDCAT 2012 paper, which you can sit online with every answer explained.
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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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