Question

Distinguish between inspiratory capacity and expiratory capacity.

Answer 1

During inspiration, the total amount of air taken by the lung with maximum effort is called Lung Capacity or the total lung capacity. The average lung capacity of an adult is 6 liters. Male have greater lung capacity than the female.

Complete answer:

Inspiratory capacity	Expiratory capacity
After normal expiration, the amount of air inhaled by a person is called inspiratory capacity (IC).	After normal inspiration, the amount of air is exhaled by a person is called expiratory capacity (EC).
Inspiratory capacity is measured by the addition of tidal volume (TV) and inspiratory reserve volume(IRV).IC= TV+ IRV	Expiratory capacity is measured by the addition of tidal volume (TV) and expiratory reserve volume (ERV).EC= TV+ IER

Additional Information: The amount of gas volume measured during the normal respiratory cycle is called lung volume or respiratory volume. Lung volume can vary depending upon various factors like height, weight of a person. The measurement of lung volume is done by a spirometer.

Note:
Tidal volume (TC): Tidal volume is the amount of air that can be inhaled or exhaled during normal breathing.
Inspiratory reserve volume (IRV): After normal inhalation, the amount of extra air that can be taken is called Inspiratory reserve volume.
Expiratory reserve volume (ERV): The amount of extra air that can be exhaled after a normal expiration is called Expiratory reserve volume.
Inspiratory and expiratory capacity of a normal male is 3.6 and 1.7 respectively.