Question 15
RespirationWhich of the following does not happen during inspiration?
- A.Intercostal muscles contract
- B.Ribs move forward
- C.Thoracic cavity increases
- D.Diaphragm relaxes
- E.Internal air pressure decreases
Show the answer and explanation
Answer: D (Diaphragm relaxes)
Explanation
During inspiration the diaphragm contracts and flattens; it relaxes during expiration.