Paheli participated in a 400 m race competition held at her school and won the race. When she came home she had mixed feelings of joy and pain as she had cramps in her leg muscles. After a massage she was relieved of the pain. Answer the following questions related to the situation.
What can be the possible reasons for the pain in her legs?
Why did she feel comfortable after a massage?
Answers
Answered by
14
while running instead of oxygen carbon dioxide enters into the body
pyruvate reacts with CO2 and forms lactic acid which causes muscle cramps
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Answer: (a) The possible reason for the pain in her legs is because lactic acid is formed in her muscles when muscle cells respire anaerobically. The accumulation of lactic acid causes muscle cramps.
(b) She felt comfortable after a massage because it improves circulation of blood. As a result, supply of oxygen to the muscle cell increases. The increase in the supply of oxygen results in the complete breakdown of lactic acid into carbon dioxide and water.
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