Biology Topic Practice

Oxygen Debt and Recovery

After vigorous exercise, you keep breathing hard to pay back the "oxygen debt".

What is oxygen debt?

What is Oxygen Debt and Recovery?

"Oxygen debt is the amount of extra oxygen required by the body after exercise to facilitate the removal of lactic acid from the system."

Question 1

What is meant by oxygen debt after vigorous exercise?

Question 2

Select what is meant by oxygen debt after vigorous exercise?

Question 3

Where is lactic acid transported after exercise so it can be converted back into glucose?

Paying Back Oxygen

Oxygen debt is the extra oxygen needed after exercise to react with lactic acid.

Lactic acid is transported from muscles to the liver.

In the liver, it is converted back into glucose using oxygen.

Exam Tip

Your pulse and breathing rate stay high until the lactic acid is cleared.

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