ChatGPT: > The upper part of your digestive system has lots of special cells that can taste things and sense fat. These cells have tiny helpers inside them cal

ChatGPT: > The upper part of your digestive system has lots of special cells that can taste things and sense fat. These cells have tiny helpers inside them called receptors, and when they taste something sweet, they send a message to your brain using a special chemical called alpha-gustducin. These receptors can also taste things like sugar, special proteins, and fake sweeteners. These cells also help your body make hormones that tell your pancreas to make more insulin when you eat something sweet. There are also other cells in the upper part of your digestive system that can sense fat, but they mostly live in the lower part of your digestive system.