3. Steroid:
cholesterol, sex hormones, cortisol, bile salts and vitamin D.
• Examples: • Structure: 4 carbon rings • Fat-soluble
4. Eicosanoids:
Subclasses: prostaglandins and leukotrienes Structure: 20 carbon fatty acid called an Arachidonic Acid Prostaglandins modify responses to hormones, contribute to inflammation, prevent stomach ulcers, dilate airways to lungs, regulate body temperature, influence the formation of blood cells. Leukotrienes participate in allergy and inflammatory responses.
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