During exhalation, the ribs ______.
move outwards
move downwards
move upwards
do not move at all
When we exhale, the ribs go back down to their normal position. The air is forced out of the lungs, so they become smaller.
During exhalation, the ribs (i) move outwards (ii) move downwards (iii) move upwards (iv) do not move at all
Tick the correct answer:
(a) In cockroaches, air enters the body through
(i) lungs
(iii) spiracles
(iv) skin
(b) During heavy exercise, we get cramps in the legs due to the accumulation of
(i) carbon dioxide
lactic acid
alcohol
(iv) water
(c) Normal range of breathing rate per minute in an average adult person at rest is
(i) 9-12
(ii) 15-18
(iii) 21-24
(iv) 30-33
(d) During exhalation, the ribs
(i) move outwards
(ii) move downwards
(iii) move upwards
(iv) do not move at all