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

1. Molecules such as ethanol can diffuse passively out of the gut and into the bloodstream, and this does not require energy. If energy is not required, then what drives the diffusion process?
   1. the high concentration of ethanol in the bloodstream
   2. the high concentration of ethanol in the gut
   3. the high pressure in the gut
   4. the high pressure in the bloodstream
2. Females have a higher concentration of alcohol in their blood after drinking the same number of drinks as a male. Differences in ethanol metabolism can account for some of the different blood concentrations. What is the other reason?
   1. Females have more fat in their bodies relative to water; since ethanol distributes into water spaces the blood alcohol concentration will be higher
   2. Females have more water in their bodies relative to fat; since ethanol distributes into water spaces the blood alcohol concentration will be higher
   3. Females have more fat in their bodies relative to water; since ethanol distributes into water spaces the blood alcohol concentration will be lower
   4. Females have more water in their bodies relative to fat; since ethanol distributes into water spaces the blood alcohol concentration will be lower
3. Ethanol, an alcohol, is a molecule that has both a polar end (OH group) and a non-polar end containing a chain of 2 C atoms. Which of the following describes the solubility of alcohol molecules with longer C atom chains?
   1. they become more soluble in water because they are more polar
   2. they become less soluble in water because they are more polar
   3. they become more soluble in water because they are more non-polar
   4. they become less soluble in water because they are more non-polar
4. In general it takes at least 1-1.5 hours to metabolize one drink of alcohol (one beer, glass of wine, or 1 shot of hard liquor). If someone drinks more than one drink of alcohol in this time period, which of the following explains why the person would become intoxicated?
   1. The person can’t “pee”, so the alcohol accumulates in the bloodstream and the brain
   2. The enzymes that metabolize alcohol start working overtime but can’t get rid of the alcohol
   3. The enzymes that metabolize alcohol become “saturated” and alcohol accumulates in the bloodstream and the brain
   4. The enzymes that metabolize alcohol basically stop working due to the excess alcohol in the bloodstream and the brain
5. The oxidation of alcohol occurs without combination of alcohol and oxygen. Which of the following best describes the oxidation of alcohol?
   1. alcohol donates 2 electrons to an acceptor molecule
   2. alcohol accepts 2 electrons from a donor molecule
   3. alcohol donates 2 H atoms to an acceptor molecule
   4. alcohol accepts 2 H atoms from a donor molecule
   5. A and C
   6. B and D

Now, check your answers here.