hormone
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Created by:
toncini0891 on May 5, 2011
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15 terms
Terms | Definitions |
|---|---|
 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 |
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