Multiple choice general knowledge science & technology What are ghrelin? The name of a Harry Potter character. A hormone that makes you want to eat more. The name of fat cells in your belly. The chemical in your brain that makes you feel good. Reveal answer Fill a bubble to check yourself B Correct answer Explanation Ghrelin is the 'hunger hormone' produced in the stomach that signals appetite to the brain. Levels rise before meals and fall after eating, making it a key regulator of hunger and food-seeking behavior.