The feeling of hunger is triggered by:

Question

Quizplus · Accepted Answer

Ghrelin is a hormone produced mainly by the stomach and it's often called the hunger hormone. It increases appetite and stimulates the secretion of growth hormone, leading to an increase in food intake and body weight. Leptin is produced by adipose cells and signals the brain that the body has had enough to eat, thereby decreasing appetite. Orexin is produced in the hypothalamus and plays a role in regulating sleep and appetite, but it primarily promotes wakefulness. Cholecystokinin is a hormone released by the intestines in response to the presence of food, and it signals to the brain that the body is full, reducing appetite.

The Feeling of Hunger Is Triggered By