I hate poachers and I love animals, but this guy I hard not to love and he does make a good villain. Utterly cruel and psychotic, he loves killing and is greedy. In fact, he's so psychotic that he attempts to feed Cody to the crocodiles when he no longer has use for him.
The first is leptin, which is a hormone secreted by your fat cells that acts as an appetite suppressant. Leptin levels peak when you fill up on food. So, when you eat a lot, your appetite goes away. If you ever said, 'I am so full I couldn't eat another bite,' then in that moment, your body was flooded with leptin.
Endocrine cells secrete by exocytosis into the fluid surrounding the cell. Endocrine cells may either be single cells or aggregations of cells and secrete hormones that serve as chemical messengers. Aggregations of endocrine cells, such as the thyroid, adrenal or pituitary glands, are ductless. 2.