1.

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

Answer»

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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