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