During normal inspiration diaphragm goes down by?
Ans. is 'a' i.e., 1-2 cmIn normal inspiration, the diaphragm descends 1-2 cm into the abdominal cavity producing a pressure difference of 1-3 mm hg and the inhalation of about 500 ml of air.
1-2 cm
3-5 cm
5-7 cm
7-9 cm