Week 3 Epithelial Glands Module Flashcards Preview

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Flashcards in Week 3 Epithelial Glands Module Deck (29):
1

what are glandular cells/glands: fxn? types (2)? multi/unicellular?

function in secretion types: exocrine or endocrine can be unicellular or multicellular

2

exocrine glands: secrete where? on what surface of epithelial cell?

secrete into ducts! secretions released on apical surface

3

are the ducts in which exocrine glands secrete just passive tubes?

no, they add/modify/concentrate/remove substances coming for exocrine glands

4

Endocrine glands: secrete where? on what surface of the epithelial cell? give an exam of an endocrine secretion

secrete directly through blood stream. secreted on basal surface of epithelial cell. Hormones!

5

what are paracrine secretions?

substance is released directly onto cells within the same epithelial surface (not a type of gland, a type of secretion)

6

what are the three modes of exocrine secretions?

merocrine, apocrine, holocrine

7

what are merocrine secretions?

most common form of exocrine secretion. vessicles filled with secretion bind the apical membrane and release their products

8

what are apocrine secretions?

budding of the product from the apical surface of the cell (surrounded by a piece of membrane)

9

what are holocrine secretions?

cell dies and ruptures to secrete its products

10

what are two types of exocrine secretions?

serous secretions, mucous secretions

11

describe serous secretions:

thin and watery with proteins that are NOT glycosylated

12

describe mucous secretions

viscous and slimy due to glycosylation

13

how do mucous secretions appear in a H&E stain?

cytoplasm will appear empty

14

what is the only major human unicellular gland?

goblet cell

15

what goblet cells secrete?

mucins, a key component of protective mucus

16

what are the type of exocrine glands?

ducts can be simple (unbranched) or compound (branched duct). Secretory portion can be tubular, alveolar/acinar, or tubuloalveolar

17

eccrine sweat glands are what type of multicellular gland?

simple coiled tubular

18

intestinal glands are what type of multicellular gland?

simple tubular glands

19

what type of glands are the exocrine glands of the pancreas? what type of secretion?

multicellular, compound acinar, serous-secretions

20

compare the endocrine pancreas to the exocrine pancreas

endocrine: formed of islets of langerhans that secrete hormones such as insulin and glucagon exocrine; compound acinar cells cells that produce a serous secretion of digestive enzymes

21

defects of the endocrine pancreas lead to...

diabetes: inability to regulate blood sugar

22

defects of the exocrine pancreas leads to...

pancreatic insufficiency (we saw this in CF!)

23

what type of secretions do intestinal glands secrete?

mucous secretions

24

what type of secretion is seen here?

Q image thumb

mucus secretions. not the large clear sections 

25

what type of exocrine gland is seen in this picture? what type of cells? what type of secretions?

Q image thumb

unicellular exocrine gland, goblet cells (circled in blue), mucus secretions 

26

orange arrow? black arrow?

Q image thumb

orange: secretory vesicles filled with mucus (do not stain)

black: goblet cells

27

from left to right, what are the modes of exocrine secretion?

Q image thumb

merocrine, apocrine, holocrine

28

what type of glands? (top to bottom)

Q image thumb

multicellular simple exocrine glands: simple tubular, simple coiled tubular, simple branched tubular, simple acinar

29

what type of glands (top to bottom)

Q image thumb

multicellular compound exocrine. 

compound tubular

compound acinar 

comound tubuloacinar 

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