Question

The capacity of air that remains in lungs after complete exhalation is (1) 80 ml (2) 120 ml (3) 200 ml (4) 400 ml

Answer 1

Answer:

It is the amount of air that can be inhaled or exhaled during one respiratory cycle[2]. This depicts the functions of the respiratory centres, respiratory muscles and the mechanics of the lung and chest wall[3].

The normal adult value is 10% of vital capacity (VC), approximately 300-500ml (6‐8 ml/kg)[3]; but can increase up to 50% of VC on exercise[4]