Question

what is inspiratory capacity?
amount of air exhaled during a normal breath
amount of air inhaled during a normal breath
maximum amount of air that can be exhaled after a normal inhale
maximum amount of air that can be inhaled after a normal exhale
maximum amount of air that can be inhaled after a forced exhale

Explanation:

Inspiratory capacity is defined as the maximum amount of air that can be inhaled after a normal exhalation. It is calculated as the sum of tidal volume (amount of air inhaled/exhaled during normal breath) and inspiratory reserve volume (additional air that can be forcefully inhaled after normal inhalation).

• Option 1: This describes tidal volume (exhaled part), not inspiratory capacity.
• Option 2: This is just tidal volume (inhaled part), not inspiratory capacity.
• Option 3: This is related to expiratory reserve volume concept (exhalation after inhalation), not inspiratory capacity.
• Option 4: Correct as per the definition of inspiratory capacity.
• Option 5: This is more related to vital capacity (inhalation after forced exhalation which includes multiple components like expiratory reserve volume, tidal volume, inspiratory reserve volume), not inspiratory capacity.

Answer:

Maximum amount of air that can be inhaled after a normal exhale