affects secretory cell itself or cells of the same tissue type within an organ
secreted by one tissue type within an organ and affect other cell types within the organ
released into bloodstream and can affect distant targets
hormones that are secreted by ductless glands
secreted by ducted glands
derived from amino acids tyrosine and tryptophan
secreted by the adrenal medulla, derived from amino acid tyrosine; epinephrine and norepinephrine, water soluble
secreted by the thyroid gland, two derivatives of tyrosine bonded together; T4 and T3, lipophilic
secreted by the pineal gland, involved in reproductive ccles, derived from tryptophan
fewer than 100 amino acids long, large and polar, cannot pass through membrane of target cell
common four ring structure of sterols, synthesized in adrenal cortex and gonads, cholesterol is a precursor, lipophilic
long polypeptide, large and polar, cannot pass through membrane of target cell
hormones bind to these specific things in or on target cells
catecholamines peptides glycoproteins
receptors embeded in plasma membrane of target cells
steroid hormones thyroid hormones
receptors located inside of the target cell
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