Upper GI Histology II Flashcards Preview

A. White- Histology > Upper GI Histology II > Flashcards

Flashcards in Upper GI Histology II Deck (22):
1

Where does the fundus (base) of gastric glands extend into?

the lamina propria

2

What are the types of cells found in the gastric glands?

mucuous

stem

chief

parietal

enteroendorcrine

3

What do mucous neck cells in the gastric glands secrete?

mucous

4

What is the function of stem cells in the gastric glands?

replacement of other cells of the gastric pit

5

What do chief cells in the gastric glands secrete?

pepsinogen

6

What do partietal cells of the gastric glands do?

manufacture HCl and secrete intrinsic factor

7

What do enteroendocrine cells do?

secrete hormones;

they are also known as APUD cells (amine precursor uptake and decarboxylation)

8

Parietal cells generate hydrogen ions from carbonic acid. What other type of cell also does this?

osteoclasts

9

Parietal cells create vesicles. What type of function dp the tubulovesicle pools have?

They excocytose and endocytose.

10

What two substances does the enteroendocrine cell secrete?

peptide hormones and serotonin

11

The surface area of the small and large intestine are increased by what structures?

plicae

crypt-villus system

12

What are plicae?

Folds of the mucosa that have a submucosal core

13

Each villus contains a core of what?

lamina propria

14

Where do the crypts extend down between?

the villi below the bases of the villi

15

What constitutes glands of the small intestine?

crypts and villi

16

What does each villus form?

a capillary plexus

17

What is a lacteal?

A blind-ending lymphatic found in each villus

18

What is the microvilli covered with?

glycoprotein and glycocalyx

19

What does the glycocalyx of the microvilli contain?

brush border enzymes:

maltase, sucrase, isomaltase, lactase, lipase, peptidases

20

The microvilli is supported by a core of what cytoskeletal component?

actin microfilaments

21

How are actin filaments bound to each other?

via actin cross-linking proteins

villin and fimbrin

22

What type of glands are gastric glands?

Simple branched tubular glands.