The following questions will help you review concepts presented in this module.

1. Where does carbon dioxide-rich blood from the capillaries in the gut go?
   1. lungs → right side of the heart → left side of the heart
   2. right side of the heart → the lungs → left side of the heart
   3. left side of the heart → the lungs → right side of the heart
   4. lungs → left side of the heart → right side of the heart
2. Ethanol is more volatile than water because it has:
   1. fewer hydrogen bonds
   2. more hydrogen bonds
   3. carbon atoms
   4. nitrogen atoms
3. Which of the following statements describes ethanol equilibrium between the blood and the alveoli?
   1. The amount of ethanol is the same in the blood relative to the alveoli.
   2. The concentration of ethanol is the same in the blood relative to the alveoli.
   3. Ethanol stops moving between the blood and the alveoli.
   4. There is no net flow of ethanol between the blood and the alveoli.
4. No energy is required for the passive diffusion of ethanol out of the gut and into the bloodstream. If energy is not required, then what drives the diffusion process?
   1. ethanol’s small molecular size
   2. proton pumps
   3. the higher concentration of ethanol in the bloodstream relative to the gut
   4. the higher concentration of ethanol in the gut relative to the bloodstream
5. When hydrogen is burned it combines with oxygen to produce water molecules. Which describes the state of each atom?
   1. Hydrogen is oxidized, Oxygen is reduced
   2. Oxygen is oxidized, Hydrogen is reduced
   3. Both are oxidized
   4. Both are reduced

Now, check your answers here.