Week 3 Epithelial Glands Module

Question 1

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

Answer 1

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

Question 2

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

Answer 2

secrete into ducts! secretions released on apical surface

Question 3

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

Answer 3

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

Question 4

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

Answer 4

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

Question 5

what are paracrine secretions?

Answer 5

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

Question 6

what are the three modes of exocrine secretions?

Answer 6

merocrine, apocrine, holocrine

Question 7

what are merocrine secretions?

Answer 7

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

Question 8

what are apocrine secretions?

Answer 8

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

Question 9

what are holocrine secretions?

Answer 9

cell dies and ruptures to secrete its products

Question 10

what are two types of exocrine secretions?

Answer 10

serous secretions, mucous secretions

Question 11

describe serous secretions:

Answer 11

thin and watery with proteins that are NOT glycosylated

Question 12

describe mucous secretions

Answer 12

viscous and slimy due to glycosylation

Question 13

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

Answer 13

cytoplasm will appear empty

Question 14

what is the only major human unicellular gland?

Answer 14

goblet cell

Question 15

what goblet cells secrete?

Answer 15

mucins, a key component of protective mucus

Question 16

what are the type of exocrine glands?

Answer 16

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

Question 17

eccrine sweat glands are what type of multicellular gland?

Answer 17

simple coiled tubular

Question 18

intestinal glands are what type of multicellular gland?

Answer 18

simple tubular glands

Question 19

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

Answer 19

multicellular, compound acinar, serous-secretions

Question 20

compare the endocrine pancreas to the exocrine pancreas

Answer 20

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

Question 21

defects of the endocrine pancreas lead to…

Answer 21

diabetes: inability to regulate blood sugar

Question 22

defects of the exocrine pancreas leads to…

Answer 22

pancreatic insufficiency (we saw this in CF!)

Question 23

what type of secretions do intestinal glands secrete?

Answer 23

mucous secretions

Question 24

what type of secretion is seen here?

Answer 24

mucus secretions. not the large clear sections

Question 25

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

Answer 25

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

Question 26

orange arrow? black arrow?

Answer 26

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

Question 27

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

Answer 27

merocrine, apocrine, holocrine

Question 28

what type of glands? (top to bottom)

Answer 28

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

Question 29

what type of glands (top to bottom)

Answer 29

multicellular compound exocrine.

compound tubular

compound acinar

comound tubuloacinar