Question

Choose the correct statements with regard to human respiration.
(A) Inspiration is facilitated by the contraction of phrenic and external inter-costal muscles
(B) Healthy human can inhale or exhale about 2000 to 3000 ml of air per minute
(C) Functional residual capacity represent the volume of left out air in lungs after expiration
(D) Total lung capacity is the total volume of air that could be accomodated in the lungs after forced inspiration.

• A. A, C, D
• B. B, D, A
• C. C, D, B
• D. A, B< C

Answer 1

Answer: (A)

A, C, D

During the process of inspiration external inter coastal muscles contract and diaphragm contract simultaneously. A healthy man can inspire or expire approximately 6000 to 8000 mL of air per minute. Functional residual capacity (FRC) is the volume of air that will remain in the lungs after a normal expiration. It is the sum of expiratory reserve volume and residual volume. Total lung capacity is the total volume of air accomodated in the lungs after the forced inspiration. So, the correct option is A.