Assertion (A): Inspiration is an active process in humans.
Reason (R): The process involves contraction of internal intercostal muscles.

see full answer

Start JEE / NEET / Foundation preparation at rupees 99/day !!

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!

An Intiative by Sri Chaitanya

Both A and R are true and R supports A

Both A and R are true but R does not support A

A is true, but R is false

Both A and R are false

answer is C.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

Inspiration is an active process in humans because it involves contraction of diaphragm and external inter-costal muscles. There is increase in pulmonary volume which decreases the pressure and allows the inward movement of air. Normal expiration is a passive process because it involves relaxation of external intercostal muscles and diaphragm but not contraction of any muscles. Forceful expiration is an active process as it involves the contraction of internal intercostal muscles and abdominal muscles.

Watch 3-min video & get full concept clarity