Leptin is a hormone closely linked to the regulation of energy consumption and expenditure: appetite, metabolism, and hunger.
A hormone is a protein with a messenger function. This means that once released into the bloodstream, she goes to another part of the body to transmit a message to specific receptors.
Leptin is manufactured in white adipocytes (adipose tissue) where triglycerides (fats) are stored and acts on the hypothalamus.
Leptin is the satiety hormone. It is through him that we realize that our stomach is full and we do not feel like eating more food. Leptin is produced by adipose tissue, the higher the body fat, the greater the amount of leptin. Finally, when their levels are high, food intake decreases and when their levels are low, they induce excess food consumption.
Jeorge did not want to eat the piece of pizza that was offered to him because he had already been fed. His stomach was full and leptin indicated he was satiated and didn't need to eat that pizza.
The organism which is least similar to the other animals is the blue whale. This is because it belongs to the order cetacea while the other animals belong to the order carnivora. This means that the other animals are carnivorous in their mode of feeding but blue whale is not.
