16. In humans, what happens when the breathing rate
increases?
1) Additional oxygen will diffuse into the blood as
carbon dioxide diffuses out of the blood in the
lungs.
2) Additional carbon dioxide will diffuse into the
blood as oxygen diffuses out of the blood in the
lungs.
3) Oxygen from body cells will diffuse more rapidly
into red blood cells.
(4) Increased oxygen dissolved in the blood will
stimulate the cerebrum to slow the breathing rate.
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