During exercise, muscles work hard. They need more energy than at rest. The energy
comes by the oxidation of food during respiration. It means greater volume of air should be
breathed in and out. This is possible by increase in the rate of lung ventilation (ie,
breathing) This is evident from one simple example: when you run fast, you deep breath and
breathing movements become faster. The long term effects of exercise are increase lung
surface area and greater vital capacity and increase in the body immunity."
(a)
Where do muscles get energy for contraction from?
(b)Why do breathing movements become faster when we run, play or do some exercise?
(c) What are short term and long term benefits of exercise?
(d) Why do muscles gets cramps after vigorous exercise?
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Answer:
LUNGS
IS THIS A COMPREHENSION? SCIENCE IS NOT BASED ON COMPREHENSION, GRAMMAR IS BASED ON COMPREHENSIONS.
Explanation:
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