ANIMAL PHYSIOLOGY
GAS EXCHANGE IN HUMANS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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After anaerobic respiration, the oxygen is needed to power the muscles further to move lactic acid to the liver
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Oxygen is required to respire anaerobically in the liver
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After anaerobic respiration, more oxygen is required to break down the accumulated lactic acids in the liver which would otherwise lower the pH of cells
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After anaerobic respiration, more oxygen is required to break down the accumulated lactic acids which would otherwise raise the pH of cells
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Detailed explanation-1: -Alternatively, the liver can break down lactic acid by reacting it with oxygen to produce carbon dioxide and water, which you might have noticed are the same products as aerobic respiration. The amount of additional oxygen that is necessary to remove lactic acid from the body is called oxygen debt.
Detailed explanation-2: -Fatigue in muscles is caused by a build-up of lactic acid, which is produced during anaerobic respiration (when there is insufficient oxygen). Oxygen debt After exercise, the lactic acid has built up and caused an extra need for oxygen – called the oxygen debt.
Detailed explanation-3: -The amount of oxygen required to remove the lactic acid, and replace the body’s reserves of oxygen, is called the oxygen debt. When someone who has been exercising pays back an oxygen debt, it can take from a few hours for normal exercise, to several days after a marathon.
Detailed explanation-4: -Anaerobic respiration occurs when there is no oxygen available and so produces an oxygen debt. This debt is equivalent to the total amount of oxygen required to oxidise the lactic acid formed from this process into carbon dioxide and water. In other words, to cancel out the debt of oxygen owed.
Detailed explanation-5: -When the body lacks the necessary oxygen to complete the process of respiration and eliminate the lactic acid, it is said to be in oxygen debt. After an individual’s activity level slows, he or she will take in extra oxygen to gradually repay this oxygen debt, allowing the cells to process the built up lactic acid.