Term
location ofMeissners plexus?
and what is the function? |
|
Definition
Submucosa
blood flow to submucosa and to inner GI Wall |
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Term
| Auerbach's plexus or myenteric plexus is found where? and what is the function? |
|
Definition
Muscularis externa (propria)
peristalsis |
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Term
| difference between the neck and the base of glands? |
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Definition
Neck: parietal cells, secrete HCL and IF
Base: Chief cells release pepsinogen in response to Ach
you find the majority of parietal cells in the fundus and not the cardia or pylorus |
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Term
| What three layers make up the mucosa? |
|
Definition
epithelium resting on a basal lamina
lamina propria: contains glands
muscularis mucosae: smooth muscle layers
|
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Term
| what two locations have glands in the submucosa? |
|
Definition
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|
Term
what type of cells are in the epithelium and basal lamina of the esophagus?
and after the z-line?
|
|
Definition
stratified squamous, nonkeratinized.
simple columnar with goblet cells |
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Term
| in the lamina propria, where are the esophageal cardiac glands located? |
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Definition
| proximal and distal esophagus |
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Term
| Describe all layers of the esophagus |
|
Definition
mucosa: -basal lamina, protects from coarse foods
-lamina propria, cardiac glands
-muscularis mucosae
Submucosa: esophageal glands proper, secrete serous cells of mucous, pepsinogen and lysozyme. also has venous plexuses
Muscularis externa: 1st only skeletal, 2nd mixed, 3rd smooth only
Adventitia: thoracic segment
or
Serosa: abdominal segment |
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|
Term
| what is Barrets esophagus? |
|
Definition
| simple columnar in stomach protect it from acid, but the stratified squamous cells in esophagus do not, the acid causes the lower esophagus to develope simple columnar cells. |
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Term
| what two layers forms the rugae folds in the stomach? |
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Definition
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Term
| what forms the gastric pits? |
|
Definition
| invagination of surface epithelium into the lamina propria |
|
|
Term
| where are lymphatic vessels in the stomach confined? |
|
Definition
| deep in th elamina propria adjacent to muscularis mucosae |
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Term
| describe the muscularis externa of the cardiac fundus compared to the rest of the stomach. |
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Definition
| around the pylorus there are 3 layers: inner oblique, middle circular and outer lingitudinal; however, the rest of the stomach only has 2 layers |
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Term
|
Definition
short pits, long glands, simple or branched tubular glands
mucous, few parietal, and few enteroendocrine cells |
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Term
| what region has branched tubular glands that fill the lamina propria, slightly longer gastric pits, long gastric glands? |
|
Definition
Fundus and body:
the surface epithelial cells secrete mucus
Parietal cells: secrete HCL and IF in response of gastrin, histamine, and Ach |
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Term
| what is the major differences between the neck region of the gland in the stomach to that of the base region? |
|
Definition
Neck: many parietal cells for HCL and IF for Vit. B12, undifferentiated cells, and mucous neck cells
Base: have chief cells for pepsinogen in response to Ach, Ghrelin is secreted during fast which tells brain "hunger"
nucleus of cheif cells are at basal layer and basophilic, while nucleus of parietal cells are central and acidophilic |
|
|
Term
| what is Zollinger-Ellison Syndrome? |
|
Definition
caused by a gastrin-secreting tumor,
may arise in the duodenum, pancreas or soft tissue |
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