exocrine glands Flashcards
(42 cards)
what are the two catagories of glands
exocrine and endocrin
what type of tissue are exocrina nd endocrine glands derived from
epithithelial tissue
what do endocrine cells secrete
hormones
how do exocrine glands convey their secretions
through epithelial lined ducts
what can happened to the secretions of exocrine glands as it travels thorugh the ducts
it can become modified
what do adenomas and adenocarcinomas develop from
glands
what are the classification of exocrine glands
type of secretion, mode of secretion and cell numbers.
what are the types of secretion
seous mucus mixed or sebaceous
whar are the modes of secretion
merocrine apocrin and holocrin
what are the cell numbers
unicellular or multicellular
where is the nucleus of mucas cells
near the basal domain
whata are some examples of mucus cells
goblet cells mucous cells of the stomach clear staining
what do mucos cells secrete
mucinogens lare glycosoalted protiens PAS Positive when hydrated form a protective layer called mucin
what do serous glands secrete
watery secetions enriched with exymes
what are some examples of serous glands
parotid and exocrine pancreas acidophilic cells
what are some exmaples of mixed glands
submadibular and sublingual glands
what do mixed glands secrete
mixture of mucus and serous fluids very clear staining but nucleaus is in the center of the cell.
what do sabaceous glands secrete
a waxy oily substance called sebum ance vulgaris
what is the diffence between a sabvacous cell and and a mucus cells slide
mucus and sabacous are bot clear in the staining but mucus has nucleus near basal lamina and sabacous is dead center.
what happends to sabacous cells at puberty
before then they can be inactive but after puberty they are activated by hormones and we get acne vulgaris inflamatory response and collagen response causing scaring and gaint cells
what happends during holocrine secretion
an entire cells is shed with its secretory products this happends in sabacouse cells
what happends during apocrine secretion
secretory product is released along with apical plasmalemma this happends in mammary glands
what happends during merocrine secretion
secretion via exocytosis no loss of plasmalemma or cytoplasm most common mode
what mode do apocrin sweet glands utilize?
merocrin