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15 terms

hormone

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