Include T3 and T4. Note that T4 is converted to T3. Has a wide range of effects in controlling metabolism Steroids - all are from Cholesterol Major source if from sex organs and adrenal cortex. Tissues that secrete them have enzymes that convert them of specific hormones. Sex hormones, cortisol are regulated by a series of events involving the hypothalamus.
Aldosterone is regulated by a the renin angiotensin system.
Peptides - run the gamut in terms of regulation and function. Effects of hormones involve binding to an extracellular receptor and activating 2nd messenger pathways. For steroids, the receptor is intracellular. Structure affects plasma solubility - steroids and thyroid hormones are rather insoluble in aqueous solutions, but lipid soluble. They are usually found bound to plasma proteins.