It is literally always hungry and massively obese, because the normal satiety signaling hormone â leptin â is absent from circulation. Researchers typically use the ob/ob mouse as a model for type II diabetes. When you inject an (obese) ob/ob mouse with leptin, it loses weight and its health markers normalize.
The tank pressure sensor is usually located on the top of the fuel pump assembly.
A full propane tank will be have mostly liquid propane stored in it, with a pocket of propane gas at the top near the valve. When you open the valve, that gas will be pushed out by the pressure inside the tank. As the pressure in the tank decreases, some of the liquid propane will change back to a gaseous form until the pressure rises again.