Endocrine Signaling: How Hormones Coordinate the Body

This lesson introduces endocrine signaling as the body’s long-range chemical communication system. Learners will distinguish endocrine signaling from neural, paracrine, autocrine, and exocrine communication, then connect hormone chemistry to transport, receptor location, response timing, and clinical interpretation.

By the end, learners should be able to explain how hormones coordinate distant tissues, why only target cells respond, how peptide, steroid, and amine hormones differ, and why feedback loops are essential for stable physiology.