The rate of heartbeat decreases when breathing rate increases.

1. False
2. True

What are the conditions that can affect the rate of breathing? When can the breathing rate increase?

Which of the following gases when decreased in the air increases the breathing rate?

Why rate of heartbeat decreases with increasing og an organism?

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