1. After vigorous exercise you may experience cramps in your leg muscles.why does this happen?
2.which raw material is responsible for the release of molecular oxygen in photosisnthesis?
3.why is more concetrated yellowish urine excrete
This is due to accumulation of lactic acid in your muscles.
When a person is doing very heavy exercise and the blood cannot supply enough oxygen, another sort of respiration called anaerobic respiration occurs. This converts glucose into energy without the need for oxygen.
Anaerobic respiration releases less energy than aerobic respiration. But during anaerobic respiration, lactic acid builds up in the muscles. High lactic acid concentrations are painful and felt as cramp.
Kindly post each question separately.