PATHOLOGY MCQ
RESPIRATORY SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The amount of oxygen needed at the end of a physical activity to break down any lactic acid.
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working at a high intensity level without oxygen for energy production.
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the volume of oxygen an athlete can consume while exercising at maximum capacity.
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smaller branches coming off the bronchi.
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Detailed explanation-1: -These processes require oxygen. This is why, when the period of activity is over, a person’s breathing rate and heart rate do not return to normal straightaway. The amount of oxygen required to remove the lactic acid, and replace the body’s reserves of oxygen, is called the oxygen debt.
Detailed explanation-2: -Oxygen debt is the oxygen required (after vigorous exercise, using up the oxygen faster than it can be breathed in) to oxidize lactic acid, created from anaerobic cellular respiration.
Detailed explanation-3: -Lactic acid is produced and starts to build up in muscle cells as a direct by-product of glucose being converted to energy. More oxygen is needed to help break down this lactic acid. Oxygen debt-when oxygen can no longer reach cells to break down lactic acid at the same rate it is being produced, oxygen debt occurs.
Detailed explanation-4: -What Does Oxygen Debt Mean? Oxygen debt occurs when the body reaches a state of anaerobic respiration during intense exercise. When a person engages in high levels of physical activity, the body cannot distribute oxygen to the cells at a sufficiently rapid pace to keep up with the oxygen demand.