Koopmans transplanted a stomach from one rat into another and connected the circulatory system of the transplant to that of the recipient.He then injected food into the implanted stomach.This experiment indicated that
A) the gastrointestinal tract produces a satiety signal.
B) food-related chemical signals from the stomach are transmitted through the circulatory system to the brain.
C) nutrients from the stomach are transmitted through the circulatory system to the brain.
D) both A and B
E) both A and C

Question

Quizplus · Accepted Answer

The experiment demonstrated that the satiety signal produced by the gastrointestinal tract (choice A) and food-related chemical signals from the stomach transmitted through the circulatory system to the brain (choice B) both exist. The injected food would have triggered these signals in the implanted stomach, which were then transmitted to the brain via the circulatory system, leading to a feeling of satiety. Therefore, choices A and B are both correct, making D the best answer. Choice C is not entirely accurate, as only the signals and not the actual nutrients were transmitted to the brain.

Koopmans Transplanted a Stomach from One Rat into Another and Connected