What sort of substances are adrenaline cortisone insulin and oestrogens?

Adrenaline, cortisone, insulin, and oestrogens are all hormones, which are chemical messengers produced by glands in the endocrine system. Adrenaline and cortisone are involved in the body's stress response, with adrenaline preparing the body for a "fight or flight" reaction, while cortisone helps regulate metabolism and immune responses. Insulin plays a crucial role in regulating blood sugar levels, facilitating the uptake of glucose into cells. Oestrogens are a group of hormones essential for the development and regulation of the female reproductive system and secondary sexual characteristics.