How are hormones distributed to tissues, and what determines which cells hormones will affect?
◦ They are distributed locally in the interstitial fluid and affect nearby responsive target cells.
◦ They are carried to specific organs by lymphatic vessels and affect the cells in those organs.
◦ They are delivered by neurosecretory cells to specific tissues and affect the cells in those tissues.
◦ They are carried throughout the body in the bloodstream, and each hormone affects target cells that have receptors for it.