Accumulation of __ takes place due to which we get cramps in our legs or arms during exercises.
oxygen
water
carbon dioxide
lactic acid
Question 5 (b) Tick the correct answer: (b) During heavy exercise, we get cramps in the legs due to the accumulation of (i) carbon dioxide (ii) lactic acid (iii) alcohol (iv) water
Lack of oxygen in muscles often leads to cramps in the legs of sprinters. This is due to conversion of pyruvate to : (a) ethanol (b) carbon dioxide (c) acetic acid (d) lactic acid
(a) In cockroaches, air enters the body through
(i) lungs
(ii) gills
(iii) spiracles
(iv) skin
(b) During heavy exercise, we get cramps in the legs due to the accumulation of
(i) carbon dioxide
(ii) lactic acid
(iii) 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