Washington MAST (Mandatory Alcohol Server Training) Practice Exam

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Blood Alcohol Concentration (BAC) measures the level of alcohol in the _______________.

Liver
Brain
Bloodstream
Stomach

The correct answer is: Bloodstream

Blood Alcohol Concentration (BAC) measures the level of alcohol in the bloodstream because alcohol is absorbed into the blood vessels in the stomach and small intestine, then transported throughout the body via the bloodstream. This means that BAC reflects the amount of alcohol that has been absorbed and is circulating in the body, not just in a specific organ like the liver, brain, or stomach. Therefore, options A, B, and D are incorrect because they do not accurately reflect the measurement of alcohol in the body.