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
what is always within the villi that are present in the SI?
lacteals
26
name three types of connections between surface epithelial cells in the SI?
zonula occluden zonula adherins desmosomes
27
name the five cells types of the SI
``` surface epithelial cell regenerative cell goblet cells enteroendocrine cells paneth cells ```
28
what is the shape of the surface absorptive cells in the SI?
tall columnar cells with microvilli
29
what do surface absorptive cells have on top of them in the SI
a glycocalyx
30
what do goblet cells secrete?
mucinogen that turns into mucin
31
what do paneth cells of the SI secrete?
lysozyme
32
what do brunners glands of the duodenum secrete? (2)
alkaline fluid and urogastrone
33
what does urogastrone do to the stomach? (2)
tells it to stop acid production and make cells divide
34
what is the name of the plexus that innervates the muscularis externa in the SI?
Auerbachs myenteric plexus
35
where is the auerbachs myenteric plexus found?
between the tow layers of the muscularis externa
36
what is the plexus that innervates the muscularis mucoasae?
Meissners submucosal plexus
37
where is the meissners submucosal plexus found?
in the submucosa just beneath the muscularis mucosae
38
what does the appendix have that makes it different in structure from LI and SI?
has crypts of LARGE lymphoid tissue
39
how does the LI differ from SI in general structure?
LI does not have the Brunners glands...all else is the same
40
what cell does the LI not have that the SI does have?
paneth cells
41
name the four cell types of LI
absorptive cell goblet cell regenerative cell enteroendocrine cell