When a lack of nutrients is detected by the stomach,the hormone ____ is released into the bloodstream and acts as a "start eating" signal when it reaches the brain.
A) leptin
B) melatonin
C) estrogen
D) ghrelin

Question

Quizplus · Accepted Answer

Ghrelin is responsible for stimulating hunger and increases food intake. It is secreted by the stomach when it is empty or when the body needs more energy. When released into the bloodstream, ghrelin acts on the hypothalamus in the brain to increase appetite and initiate food intake. Leptin, on the other hand, is a hormone that is released by fat cells to signal the brain that the body has enough energy and can stop eating. Melatonin and estrogen are not directly involved in regulating hunger and appetite.

When a Lack of Nutrients Is Detected by the Stomach,the