Which factor explains why alcohol generally moves into the bloodstream faster in females than in males?

• A. Body size
• B. Gender
• C. Food
• D. Medicine

Answer: (B)

Differences in how the body handles alcohol due to gender explain why it tends to enter the bloodstream faster in females. Females typically have less total body water and a higher body fat percentage, so the same amount of alcohol is more concentrated in the blood. They also often have lower gastric alcohol dehydrogenase activity, meaning less alcohol is metabolized before reaching the bloodstream. These sex-related physiological differences cause alcohol to appear in the bloodstream more quickly, which is why gender is the best explanation among the options. While body size can influence concentration after absorption and food or medicines can affect absorption or metabolism, they don’t account for the general, consistent faster uptake linked to gender.