NHSA Module 8 Practice Test

The key idea is that body composition affects how alcohol is absorbed and distributed in the body. Alcohol dissolves in water, so people with more total body water (typically those with more muscle) provide a larger volume for the alcohol to distribute into. With more distribution volume, alcohol can reach the bloodstream more readily, causing a quicker rise in blood levels compared to someone with higher fat content, who has less body water to dissolve the alcohol. So the statement that more muscular individuals absorb more alcohol than those with higher fat reflects how body composition can influence absorption rate. In contrast, saying body composition has no effect or that absorption is constant ignores the role of body water, and claiming that more fat leads to faster absorption contradicts the water-distribution mechanism.