1. Blood richest in oxygen is found in the
a. inferior vena cava
b. superior vena cava
c. pulmonary arteries
d. pulmonary veins
e. systemic capillaries
2. The breathing rate is controlled by chmoreceptors that mainly detect
a. levels of oxygen in the alveolar air space
b. levels of oxygen in the blood
c. levels of carbon dioxide in the alveolar air space
d. levels of carbon dioxide in the blood
e. conscious control of our brain
3. The iron in a hemoglobin molecule is actually what binds the oxygen
true or false?
3. trueSource(s): I am a physiologist.
2. Not sure
3. True, I believe.
Fe-O & Fe-CO2