What term refers to the amount of alcohol present in a person's blood, measured in grams per 100 mL?

The term that refers to the amount of alcohol present in a person's blood, measured in grams per 100 mL, is commonly known as blood alcohol concentration. This measurement indicates the percentage of alcohol in a person's bloodstream and is crucial for assessing levels of intoxication and determining legal limits for activities such as driving. A higher blood alcohol concentration signifies a greater impairment level and greater risk of alcohol-related accidents or health issues.

The other terms, while related to health and alcohol, do not accurately define this specific measurement. Blood pressure relates to the force of blood against the walls of the arteries and is not a measure of alcohol. Bioethanol level is generally associated with ethanol produced from biological materials, not the concentration of alcohol in a person's system. Alcohol tolerance level refers to an individual's ability to process alcohol without showing signs of impairment, which is not the same as measuring the concentration of alcohol in the blood.