What Happens When There Is a Decrease in the Oxygen

Multiple Choice

What happens when there is a decrease in the oxygen level in the blood?

A) Pituitary stimulates the respiratory system to increase respiratory rate.
B) The alveoli diffuse more oxygen into the blood.
C) Chemoreceptors in the carotid body and aortic body stimulate the respiratory centers to modify respiratory rates.
D) The parietal pleura increases the negative pressure.