Question
Biology Question on Exchange Of Gases
During inspiration, the diaphragm
A
Expands
B
Contracts and flattens
C
Shows no change
D
Relaxes to become dome shaped
Answer
Contracts and flattens
Explanation
Solution
Diaphragm is a muscular structure present between abdominal and thoracic cavity in mammals. In normal condition, diaphragm is dome shaped. During inspiration, it becomes flat due to contraction and during expiration, it becomes relaxed.