The volume of air taken in and out of the lungs during normal breathing is called __________.
A
tidal volume
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B
residual volume
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C
inspiratory reserve volume
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D
expiratory reserve volume
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Solution
The correct option is A tidal volume Tidal volume (TV) is the volume of air taken in and out of the lungs during normal breathing. In a healthy person the tidal volume is 500 ml.
Residual volume (RV) is the volume of air that is left in the lungs even after forceful exhalation. It is about 1100ml-1200ml.
Inspiratory reserve volume (IRV) is the volume of air that can be inhaled forcefully after a normal inhalation. Its value is in the range of 2500 ml-3000ml.
Expiratory reserve volume (ERV) is the volume of air that can be exhaled forcefully after a normal exhalation. Its value is in the range of 1000 ml to 1100 ml.