Question

which of the following is correct?. Single choice

Plants do not need oxygen for respiration
we get cramp in the legs during heavy exercise due to accumulation of lactic acid
The main product of aerobic respiration are lactic acid, carbon dioxide and water
None of these

Answer 1

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4th Option is the one.

Answer 2

Answer:

During heavy exercise, the demand for energy is high but the supply of oxygen to produce energy is limited. Therefore, anaerobic respiration takes places in the muscles cells to fulfil the demand for energy. This anaerobic breakdown of glucose leads to the formation of lactic acid in muscles. The accumulation of lactic acid in muscles leads to muscle cramps.

HenceDuring heavy exercise, we get cramps in the legs due to the accumulation of Lactic acid.

So, the correct answer is 'Lactic acid'.