In: Biology
Consider the concentration gradients of oxygen and carbon dioxide to determine their direction of movement at the alveoli of the lungs.
Select the true statement.
Oxygen moves down its concentration gradient from the lungs to the blood. Carbon dioxide moves down its concentration gradient from the lungs to the blood.
Oxygen moves down its concentration gradient from the lungs to the blood. Carbon dioxide moves down its concentration gradient from the blood to the lungs.
Oxygen moves down its concentration gradient from the blood to the lungs. Carbon dioxide moves down its concentration gradient from the lungs to the blood.
Oxygen moves up its concentration gradient from the lungs to the blood. Carbon dioxide moves up its concentration gradient from the lungs to the blood.
Oxygen moves up its concentration gradient from the lungs to the blood. Carbon dioxide moves up its concentration gradient from the blood to the lungs.