GCSE Biology - Exercise & Oxygen Debt #22

The video explains how exercise increases the body's need for cellular respiration, requiring more oxygen for muscle activity. It contrasts aerobic and anaerobic respiration, highlighting the inefficiency and lactic acid production of the latter. The concept of oxygen debt is introduced, describing how the body repays it post-exercise by converting lactic acid back to glucose in the liver. Finally, it covers methods to measure the effects of exercise on breathing and heart rate.

What happens to the rate of breathing during exercise and why?

Explain the difference between aerobic and anaerobic respiration.

What is lactic acid and how does it affect the body after exercise?

Describe the concept of oxygen debt and its significance.

How can we measure breathing rate and heart rate before and after exercise?