TIPS Alcohol Physiology & Blood Alcohol Content 5 — Questions and Answers
Question 1: A patron has been drinking for 3 hours and their BAC is estimated at 0.10%. Approximately how long will it take for their BAC to return to 0.00% assuming no more drinking?
- About 1 hour
- About 3 hours
- About 5–7 hours (Correct answer)
- About 10–12 hours
Correct answer: About 5–7 hours
The liver metabolizes alcohol at roughly 0.015–0.020% BAC per hour, so a 0.10% BAC takes approximately 5–7 hours to fully eliminate.
Question 2: Which factor does NOT meaningfully affect a person's BAC when consuming the same amount of alcohol?
- Body weight
- Gender
- Eye color (Correct answer)
- Rate of consumption
Correct answer: Eye color
Eye color has no physiological relationship to alcohol metabolism or distribution; weight, gender, and drinking pace all directly influence BAC.
Question 3: The 'first-pass metabolism' of alcohol refers to:
- Alcohol being exhaled through the lungs before reaching the blood
- Partial breakdown of alcohol in the stomach and liver before it reaches systemic circulation (Correct answer)
- The rapid absorption of the first drink compared to subsequent drinks
- Alcohol being filtered by the kidneys on its first pass
Correct answer: Partial breakdown of alcohol in the stomach and liver before it reaches systemic circulation
First-pass metabolism is the partial oxidation of alcohol by gastric and hepatic enzymes before it enters systemic circulation, reducing the amount that reaches the bloodstream.
Question 4: At approximately what BAC level do most people begin to show obvious signs of intoxication such as slurred speech and poor coordination?
- 0.02–0.03%
- 0.04–0.05%
- 0.08–0.10% (Correct answer)
- 0.15–0.20%
Correct answer: 0.08–0.10%
Around 0.08–0.10% BAC, most individuals exhibit clearly observable impairment including slurred speech, reduced motor coordination, and impaired judgment.
Question 5: Carbonated mixers such as tonic water or soda accelerate alcohol absorption because:
- They contain sugars that react with alcohol
- Carbonation increases gastric pressure, speeding gastric emptying into the small intestine (Correct answer)
- They lower the pH of alcohol, making it more water-soluble
- Carbon dioxide directly carries alcohol through the stomach wall
Correct answer: Carbonation increases gastric pressure, speeding gastric emptying into the small intestine
Carbonation speeds gastric emptying, moving alcohol to the small intestine — where absorption is fastest — more quickly than still liquids.
Question 6: A TIPS-certified server notices a guest exhibiting euphoria and mild loss of inhibition. This most likely corresponds to a BAC around:
- 0.01–0.02%
- 0.03–0.06% (Correct answer)
- 0.10–0.12%
- 0.15–0.20%
Correct answer: 0.03–0.06%
Mild euphoria, relaxation, and slight loss of inhibition typically occur at BAC levels between 0.03–0.06%, before more obvious impairment sets in.
Question 7: Why is it inaccurate to say that coffee or cold showers 'sober up' an intoxicated person?
- These methods accelerate alcohol metabolism in the liver
- They only mask symptoms temporarily but do not lower BAC (Correct answer)
- Cold water causes alcohol to leave the body through sweat
- Caffeine chemically neutralizes alcohol in the bloodstream
Correct answer: They only mask symptoms temporarily but do not lower BAC
Only time and liver metabolism lower BAC; coffee and cold showers may increase alertness but do not speed alcohol elimination or reduce blood alcohol concentration.
TIPS Alcohol Physiology & Blood Alcohol Content 5
A patron has been drinking for 3 hours and their BAC is estimated at 0.10%.
Approximately how long will it take for their BAC to return to 0.00% assuming no more drinking?