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Question
After forceful inspiration, the amount of air that can be breathed out by maximum forced expiration is equal to
After forceful inspiration, the amount of air that can be breathed out by maximum forced expiration is equal to
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Solution
The correct option is D IRV + TV + ERV
Vital capacity is the maximum amount of air a person can expel from the lungs after a maximum inhalation. It is equal to the sum of inspiratory reserve volume, tidal volume and expiratory reserve volume. In a healthy young adult, IRV measures about 3 L and the ERV is approximately 1.1 litre TV is about 500 ml in an averagely built (70 kg), healthy, young adult. Hence, VC is about 4 to 4.6 litres.
Vital capacity is the maximum amount of air a person can expel from the lungs after a maximum inhalation. It is equal to the sum of inspiratory reserve volume, tidal volume and expiratory reserve volume. In a healthy young adult, IRV measures about 3 L and the ERV is approximately 1.1 litre TV is about 500 ml in an averagely built (70 kg), healthy, young adult. Hence, VC is about 4 to 4.6 litres.
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