NEET BIOLOGY

Detailed explanation-1: -Oxygen debt is a natural, temporary process. When we perform intense exercise, glucose (a sugar that comes from carbohydrates) is broken down to provide energy to our muscles, which produces lactic acid as a result. Oxygen is then used to break down the unwanted lactic acid into carbon dioxide and water.

Detailed explanation-2: -HT: oxygen debt, to be precise, is the amount of extra oxygen needed to react with lactic acid in muscles and remove it from cells. The blood flow through muscles removes lactic acid and transports it to the liver. In the liver, the lactic acid is converted back into glucose.

Detailed explanation-3: -Lactic acid can be removed in the following ways: Oxidation into carbon dioxide and water in the inactive muscles and organs. Used by the muscles as an energy source. Transported in the blood to the liver where it is converted to blood glucose and glycogen (cori cycle, see Key terms).

Detailed explanation-4: -After running you continue to breathe quickly. The extra oxygen you breathe in reacts with the lactic acid in your muscles, breaking it down to make carbon dioxide and water.

Detailed explanation-5: -Muscle use can quickly overwhelm the ability of the body to deliver oxygen. Muscle fibers must switch to anaerobic metabolism and produce lactic acid, at which point the muscle begins to fatigue. The difference between the amount of oxygen needed by the muscles and the actual amount present is called the oxygen debt.