Examveda
Examveda

At the time of inspiration the diaphragm

A. Expand

B. Contract

C. Relaxed

D. Does not under any change

Answer: Option B

Solution(By Examveda Team)

When the lungs inhale, the diaphragm contracts and pulls downward. At the same time, the muscles between the ribs contract and pull upward. This increases the size of the thoracic cavity and decreases the pressure inside. As a result, air rushes in and fills the lungs.

Join The Discussion

Related Questions on Biology

Ozone hole refers to

A. hole in ozone layer

B. decrease in the ozone layer in troposphere

C. decrease in thickness of ozone layer in stratosphere

D. increase in the thickness of ozone layer in troposphere