During expiration occurs –
A. Contraction of diaphragm and external intercostal muscles.
B. Relaxation of diaphragm and external intercostal muscles.
C. Relaxation of the diaphragm only.
D. Contraction of diaphragm and external intercostal muscles.
Answer:B
During expiration occurs –
A. Contraction of diaphragm and external intercostal muscles. B. Relaxation of diaphragm and external intercostal muscles. C. Relaxation of the diaphragm only. D. Contraction of diaphragm and external intercostal muscles.