Select the correct events that occur during inspiration A Contraction of the diaphragm
B Contraction of external intercostal muscles
C Pulmonary volume decreases
D Intrapulmonary pressure increases
Option: 1 (a) and (b)
Option: 2 (c) and (d)
Option: 3 (a) , (b) and (d)
Option: 4 only (d)
During inspiration, the diaphragm and external intercostal muscles contract, pulmonary volume increases and the intrapulmonary pressure decreases.