Why does an athlete breathe faster and deeper than
finishing the race?
2 List the similarities and differences between aerobic and
respiration
Why do we often sneeze when we inhale a lot of dust-laden a
* Take three test-tubes. Fill th of each with water. Label the
C. Keep a snail in test-tube A, a water plant in test-tube :
keep snail and plant both. Which test-tube would have
concentration of CO,?
5. Tick the correct answer:
In cockroaches, air enters the body through
(1) lungs
(ii) Spiracles
(iv) skin
(b) During heavy exercise, we get cramns in
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Answer:
Our body needs energy for all activities, which is provided by oxidation of food during respiration. ... Hence, more oxygen is required to meet this extra demand of energy. Therefore, an athlete breathes faster and deeper than usual after finishing the race so as to provide extra oxygen and hence extra energy to the body.
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