At the beginning of a 3-hour lab section in a general biology class, all the stu

Question

At the beginning of a 3-hour lab section in a general biology class, all the students went to the restroom to empty their bladders. A few minutes later, 1/3 of the students drank 350 ml of water (Group A), 1/3 of the students drank 350 ml of a hypertonic NaCl solution (Group B), and, 1/3 of the students drank 350 ml of beer (Group C). All else being equal, which one of the following results would you most likely expect?

A. During the lab period, students in Group A would produce the greatest amount of urine.

B. During the lab period, students in Group B would produce the greatest amount of urine.

C. During the lab period, students in Group C would produce the greatest amount of urine.

D. During the lab period, urine production in the 3 groups of students would be about the same.

Explanation / Answer

During the lab period, students in Group A would produce the greatest amount of urine - Water being an isotonic solution, the urine output will be more compared to a hypertonic solution. Alcoholic beer is hypertonic solution, but, non-alcoholic beers are hypotonic. When non-alcoholic beer is consumed, the urine output will be more than consuming isotonic solutions.

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