Which of the following produces a substantial increase in the caloric intake of laboratory rats and a significant increase in their body weight?
A) removing thiamine from their usual laboratory chow
B) adding thiamine to their usual laboratory chow
C) offering them a cafeteria diet, rather than their usual laboratory diet
D) sham feeding them
E) both C and D

Question

Quizplus · Accepted Answer

Offering the laboratory rats a cafeteria diet, rather than their usual laboratory diet, would increase the availability and variety of food options, leading to a substantial increase in caloric intake and a significant increase in body weight. Removing or adding thiamine to their diet would not have such a significant impact, and sham feeding (feeding without actual ingestion) would not increase their caloric intake. Therefore, the correct answer is C: offering them a cafeteria diet, rather than their usual laboratory diet.

Which of the Following Produces a Substantial Increase in the Caloric