Question

Arrange the following in order of increasing volume.
$1$. Tidal volume

$2$. Residual volume

$3$. Expiratory reserve volume

$4$. Vital capacity

• A. $1<2<3<4$
• B. $1<4<3<2$
• C. $1<3<2<4$
• D. $1<4<2<3$

Answer 1

Answer: (C)

$1<3<2<4$

• Tidal volume is the amount of air that can be inhaled or exhaled during one respiratory cycle, which is approximately 300-500ml.
• Residual volume is the volume of air remaining in the lungs after a maximal exhalation. Normal adult value is averaged at 1200ml.
• Expiratory reserve volume is the volume of air that can be exhaled forcibly after exhalation of normal tidal volume. The normal adult value is 700-1200ml.
• Vital capacity is the total amount of air exhaled after a maximal inhalation. The value is about 4800ml.

So the correct answer is option C.