Week 3 Epithelial Glands Module Flashcards Preview

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

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

A

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

2
Q

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

A

secrete into ducts! secretions released on apical surface

3
Q

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

A

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

4
Q

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

A

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

5
Q

what are paracrine secretions?

A

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

6
Q

what are the three modes of exocrine secretions?

A

merocrine, apocrine, holocrine

7
Q

what are merocrine secretions?

A

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

8
Q

what are apocrine secretions?

A

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

9
Q

what are holocrine secretions?

A

cell dies and ruptures to secrete its products

10
Q

what are two types of exocrine secretions?

A

serous secretions, mucous secretions

11
Q

describe serous secretions:

A

thin and watery with proteins that are NOT glycosylated

12
Q

describe mucous secretions

A

viscous and slimy due to glycosylation

13
Q

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

A

cytoplasm will appear empty

14
Q

what is the only major human unicellular gland?

A

goblet cell

15
Q

what goblet cells secrete?

A

mucins, a key component of protective mucus

16
Q

what are the type of exocrine glands?

A

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

17
Q

eccrine sweat glands are what type of multicellular gland?

A

simple coiled tubular

18
Q

intestinal glands are what type of multicellular gland?

A

simple tubular glands

19
Q

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

A

multicellular, compound acinar, serous-secretions

20
Q

compare the endocrine pancreas to the exocrine pancreas

A

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
Q

defects of the endocrine pancreas lead to…

A

diabetes: inability to regulate blood sugar

22
Q

defects of the exocrine pancreas leads to…

A

pancreatic insufficiency (we saw this in CF!)

23
Q

what type of secretions do intestinal glands secrete?

A

mucous secretions

24
Q

what type of secretion is seen here?

A

mucus secretions. not the large clear sections

25
Q

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

A

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

26
Q

orange arrow? black arrow?

A

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

27
Q

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

A

merocrine, apocrine, holocrine

28
Q

what type of glands? (top to bottom)

A

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

29
Q

what type of glands (top to bottom)

A

multicellular compound exocrine.

compound tubular

compound acinar

comound tubuloacinar

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