Question

6. 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.
(a) What can be the possible reasons for the pain in her legs?
(b) Why did she feel comfortable after a massage? (5M)

Answer 1

Answer:

a) the cramps in the legs was due to anaerobic respiration of the muscles cells forming lactic acid in the muscles of the leg.

b) after the massage she felt comfortable because aerobic respiration started in the muscles and the debt of oxygen in the muscles was cleared forming CO2 and lessening the effect of lactic acid .

hope this helps...