Finale Review: Upper GI Flashcards Preview

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Flashcards in Finale Review: Upper GI Deck (20):
1

How is the epithelium distributed in the Gut Tract? How is muscle distributed?

Stratified, non-keratinized squamoud epithelium at either end (esophagus and anal canal). And simple columnar mucosa along the rest of its length.

Skeletal muscle is found at either end and smooth muscle along most of its length.

2

What layer does the enamel organ arise from?

Ectoderm

3

______ ____ forms the dental papilla which forms what three tissues?

Neural crest,
dentin
cementum
pulp

4

How many types of papillae does the tongue have?

FOUR

5

The filiform papillae lack _____ _____?

taste buds

6

Amelogenins and enamelins are unique to ?

enamel

7

Taste buds have _____ cells and taste cells

sustentacular

8

Taste cells have ______ microvilli with state receptors and release __________ from their basal membranes.

apical, neurotransmitters

9

Von Ebner's Glands are _________ glands associated with _________ papillae

serous, circumvallate

10

What are the layers of the gut tube from inside to outside?

Mucosa
submucosa
external muscle layer
the serosa (adventitia)

11

The simple columnar epithelium, lamina propria, and muscularis interna are characteristic of what?

The mucosa

12

The external muscular layer is made up of an inner layer of _____ ______ and an outer layer of _____ ______.

circular smooth muscle, longitudinal muscle.

13

The submucosal plexus (Meissner's plexus) is what?

a nerve plexus located between the submucosa and the circular muscle layer of the muscularis externa.

14

The myenteric plexus (of Auerbach) is what?

a nerve plexus located between the two layers of the muscularis externa.

15

What do the cardiac and plyloric regions of the stomach contain?

Mostly mucosa glands

16

The fundic and body regions of the stomach contain?

gastric glands

17

What is the appearance and location of gastric glands?

long tubular glands extending down to the muscularis mucosae.

18

What are gastric glands composed of?

mucous neck cells
parietal cells,
chief cells,
stem cells, and
enteroendocrine cells

19

The parietal cell is the unique cell of the gastric gland what are the characteristic of it?

1. large pyramidal shaped
2. eosinophilic cell that produce HCl and gastric intrinsic Factor
3. it generates hydrogen ion from carbonic acid and is characterized by prominent intracellular canliculi lined by microvilli

20

The chief cells secrete

pepsinogen