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GI Prep > Lower GI Histo > Flashcards

Lower GI Histo Flashcards

1
Q

what cells of the pancreas are considered exocrine cells?

A

acinar cells

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2
Q

what do acinar cells have at the apical part that secrete stuff?

A

zymogen granules

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3
Q

when acinar cells secrete contents…what do they intially go into?

A

intercalated ducts

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4
Q

what type of cell is the one that forms the initial part of the intercalated ducts and is partially in the acinar cells?

A

centroacinar cells

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5
Q

how do centroacinar cells appear on staining?

A

pale cells

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6
Q

after going through the intercalated ducts…where do pancreatic secretions go next?

A

intralobular ducts and then main pancreatic ducts

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7
Q

what is the shape of the classic liver lobule?

A

a hexagon

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8
Q

what is at the center of the classic liver lobule?

A

central vein

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9
Q

what is at the point of each side of the hexagon on the classic liver lobule?

A

portal triads

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10
Q

what do portal triads consist of in the liver?

A

venule arteriole and bile duct1

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11
Q

what is a hepatic acinus?

A

two adjacent liver lobules connected

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12
Q

how is a hepatic acinus divided?

A

into three zones…123

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13
Q

what zone gets the most oxygen and what zone gets the least?

A

zone1 gets the most since it is closest to the vessels running between the lobules…zone 3 gets the least

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14
Q

what runs between adjacent plates of hepatocytes?

A

sinusoids

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15
Q

do sinusoids in liver have fenestration?

A

you betcha

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16
Q

what unique macrophage resides in the liver? where does it play its role?

A

Kupfffer cells are in the sinusoids

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17
Q

what lies between the sinusoid and hepatocytes?

A

space of disse

18
Q

what cell resides in the space of disse?

A

ito or fat storing cells

19
Q

what is the role of ito/fat storing cells?

A

store fat…specifically vitamin A

and make collagen if liver is compromised

20
Q

what collects bile in the liver? where is it located?

A

bile canaliculi that are located between each hepatocyte

21
Q

what type of epithelium is in the gallbladder?

A

simple columnar with microvilli

22
Q

can the gallbladder absorb anything? if so what?

A

yes…absorbs water and bile

23
Q

what cell is present in the epithelium of the SI?

A

goblet cells

24
Q

what gland is present in the submucosa of the duodenum?

A

brunners glands

25
Q

what is always within the villi that are present in the SI?

A

lacteals

26
Q

name three types of connections between surface epithelial cells in the SI?

A

zonula occluden
zonula adherins
desmosomes

27
Q

name the five cells types of the SI

A 
surface epithelial cell
regenerative cell
goblet cells
enteroendocrine cells
paneth cells
28
Q

what is the shape of the surface absorptive cells in the SI?

A

tall columnar cells with microvilli

29
Q

what do surface absorptive cells have on top of them in the SI

A

a glycocalyx

30
Q

what do goblet cells secrete?

A

mucinogen that turns into mucin

31
Q

what do paneth cells of the SI secrete?

A

lysozyme

32
Q

what do brunners glands of the duodenum secrete? (2)

A

alkaline fluid and urogastrone

33
Q

what does urogastrone do to the stomach? (2)

A

tells it to stop acid production and make cells divide

34
Q

what is the name of the plexus that innervates the muscularis externa in the SI?

A

Auerbachs myenteric plexus

35
Q

where is the auerbachs myenteric plexus found?

A

between the tow layers of the muscularis externa

36
Q

what is the plexus that innervates the muscularis mucoasae?

A

Meissners submucosal plexus

37
Q

where is the meissners submucosal plexus found?

A

in the submucosa just beneath the muscularis mucosae

38
Q

what does the appendix have that makes it different in structure from LI and SI?

A

has crypts of LARGE lymphoid tissue

39
Q

how does the LI differ from SI in general structure?

A

LI does not have the Brunners glands…all else is the same

40
Q

what cell does the LI not have that the SI does have?

A

paneth cells

41
Q

name the four cell types of LI

A

absorptive cell
goblet cell
regenerative cell
enteroendocrine cell

GI Prep (12 decks)

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