Final answer:
The BAC is a measurement of the amount of alcohol in a person's blood. Alcohol intoxication is determined by having a BAC above a certain threshold. The effects of alcohol depend on the individual's BAC.
Step-by-step explanation:
The BAC (blood alcohol concentration) is a measurement of the amount of alcohol in a person's blood.
Alcohol intoxication is often defined as having a BAC greater than 5.4-17.4 mmol/L (25-80 mg/dL or 0.025-0.080%). This can be measured using blood or breath testing.
The immediate effects of alcohol vary based on the drinker's BAC, which can be influenced by factors such as age, sex, and pre-existing health conditions.