3. Expiration of air from the lungs is a mostly passive process not requiring muscle action. True or False?

4. Oxygen is transported around the cardiovascular system by dissolving within the blood.

True or False?

False and true (i'm not sure fully)

Explain:    

         Inside the air sacs, oxygen flows through paper-thin walls to tiny blood vessels known as capillaries, where it is absorbed into the blood. The oxygen is then transported throughout your body by a protein called haemoglobin, which is found in red blood cells.

hope this helps!!!

if you are asking how much they can go over the 1500 limit it would be safetly within the 2310 and 2600.mg

the correct answer is c