When you exercise vigorously a rate of breathing increases, why?

Option 1 : the supply more oxygen to cells to release more energy

Option 2 : to remove the lactic acid formed

Option 3 : to increase the heartbeat

Option 4: to expand and contract the lungs

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Solution

option 1 is correct.
When we do vigorous exersice, we need more energy and to produce that energy we need more oxygen supply to the lungs. So the heart needs to supply oxygenated blood to all parts of the body. Therefore the rate of breathing increases.

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When you exercise vigorously a rate of breathing increases, why? Option 1 : the supply more oxygen to cells to release more energy Option 2 : to remove the lactic acid formed Option 3 : to increase the heartbeat Option 4: to expand and contract the lungs

When you exercise vigorously a rate of breathing increases, why?

Option 1 : the supply more oxygen to cells to release more energy

Option 2 : to remove the lactic acid formed

Option 3 : to increase the heartbeat

Option 4: to expand and contract the lungs