Exercise and Oxygen Debt Flashcards

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Note: We may include questions that have multiple correct answers. It’s useful to remember specific examples to understand these concepts better.

What happens to the demand for energy when we exercise and why?

The demand for energy increases due to more muscle contraction, requiring an increased rate of cellular respiration.

How does our body respond to the increased demand for energy during exercise?

There is an increase in breathing rate, breathing volume, and heart rate to supply more oxygen and glucose to the muscles.

What happens when the body cannot supply enough oxygen to the muscles during intense exercise?

Anaerobic respiration takes place in the muscles.

How can you measure heart rate and respiratory rate?

Heart rate: Press the index and middle fingers on the inside of your wrist and count the beats per minute.

Respiratory rate: Count how many times the chest rises per minute.

What is oxygen debt and how is it repaid?

Oxygen debt is the amount of extra oxygen required to remove lactic acid from muscles after exercise. It is repaid by breathing heavily to convert lactic acid back to glucose in the liver.

What is the main problem with anaerobic respiration?

The main problem with anaerobic respiration is that it causes lactic acid to build up in the muscles, which prevents efficient muscle contraction.

What happens to the demand for energy when we exercise and why?

The demand for energy increases due to more muscle contraction, requiring an increased rate of cellular respiration.

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