Exercises
finishing the race?
concentration of Co?
5. Tick the correct answer:
(a) In cockroaches, air enters the body through
(i) lungs
(ii) gills
(iii) spiracles
(iv) skin
accumulation of
(i) carbon dioxide
lactic acid
(iii) alcohol
(iv) water
(c) Normal range of breathing rate per minute in an average adul
person at rest is:
1. Why does an athlete breathe faster and deeper than a
2. List the similarities and differences between aerobic and so
3. Why do we often sneeze when we inhale a lot of dust-laden air
4. Take three test-tubes. Fill 3/4th of each with water. Label the AB
keep snail and plant both. Which test-tube would have the ti
C. Keep a snail in test-tube A a water plant in test-tube Band
(b) During heavy exercise. we get cramps in the legs due to be​