4.2.2 Response to Exercise
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6 Terms
What is oxygen debt?
The amount of extra oxygen the body needs after exercise to react with accumulated lactic acid and remove it from the cells.
How is lactic acid removed from the muscles?
Blood transports lactic acid to the liver, where it is converted back to glucose.
What happens if lactic acid builds up in the muscles?
It causes fatigue and prevents the muscles from contracting properly.
Why does respiration occur faster during exercise?
More energy is needed for muscle contraction, so respiration must supply more oxygen and remove more carbon dioxide.
How does the body increase oxygen supply during exercise?
By increasing heart rate, breathing rate, and breath volume.
Which three physiological changes occur during exercise to increase oxygen delivery?
Heart rate increases, breathing rate increases, and breath volume increases.
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