Endocrine 2 Flashcards
in AP - give supportive fxn, secrete factors that act on paracrine factors
chromophilic cells
in AP - increase # of secretory granules/vesicles that contain hormones
chromophobi cells
vesicles react to acid dyes, stain pink bind eosin
acidophils
vesicles react to basic dyes stain blue
basophils
supportive cells –> chromophilic –> few secretory vesicles
foliiculostellate cells
PP - neuroglial in nature
pituicytes
Herring bodies packed with secretory vesicles for storage and secretion of peptide hormones
nervous material
Thyroid - follicular ep. cells that syntheisize, store, secrete thyroid –>TSH from AP
Follicular Units
Thyroid - increase Ca2+ ions by secretory hormone calcitonin; inhibts release of Ca2+ from bone
calcitonin released basally into CT, calcitonin then picked up by fenestrated capillaires
Parafollicular cell clusters
Parathryoid gland - inactive, non secretory cells
oxyphil cells
Parathyroid - chromophilic, secretory vesicles, respond to decreases in circulatory Ca2+ levels, secrete PTH, liberates Ca2+
stim. the intestinal ep. to increase Ca2+ absorption
chief cells