EVERYDAY SCIENCE

Detailed explanation-1: -During heavy exercise when the supply of oxygen to our muscle cells is insufficient, food breakdown is by anaerobic respiration. Breathing is a part of the process of respiration during which an organism takes in the oxygen-rich air and gives out air rich in carbon dioxide.

Detailed explanation-2: -When we do heavy exercise, sufficient oxygen is not present in the muscle cells for oxidation, so the muscle cells undergo anaerobic respiration giving out lactic acid as a by-product. Accumulation of lactic acid in the muscles cause muscular cramps. On further availability of oxygen, this lactic acid is broken down.

Detailed explanation-3: -Answer: Anaerobic type of respiration takes place in human muscles during vigorous physical exercise.

Detailed explanation-4: -Explanation: 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.

Detailed explanation-5: -Respiration is a chemical reaction which takes place in all livings cells and releases energy from glucose. Anaerobic respiration occurs without oxygen and releases less energy but more quickly than aerobic respiration. Anaerobic respiration in microorganisms is called fermentation.