Lipid hormones are hormones derived from lipids such as sterols and fatty acids. They are typically non-polar and can pass through cell membranes easily.
Steroid Hormones: A type of lipid hormone derived from cholesterol. Examples include testosterone and estrogen.
Peptide Hormones: These are hormones made up of amino acids. Unlike lipid hormones, they cannot pass directly through the cell membrane.
Endocrine System: The system in the body responsible for producing, storing, and secreting hormones.