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stage 1 Gastrointestinal tract > GI1 Microanatomy > Flashcards

GI1 Microanatomy Flashcards

1
Q

What is the function of the gut?

A
  1. absorption of nutrients
  2. immune function
  3. excretion
  4. communication ( enteric NS)
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2
Q

What 2 main groups are present in the GI?

A
  1. alimentary canal : where the food goes

2. accessory digestive organs

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3
Q

The 4 layers of the GI tract

A
  1. mucosa : inner most what the food touches
  2. submucosa: (glands, submucosal (meissners) plexus, lymphatics)
  3. muscularis externa (mooth muscle, inner circular, outer longitudinal, myenteric plexus- large and small intestine)
  4. meissners (serosa/ loose connective tissue)
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4
Q

What makes up the mucosa layer of the GI?

A

inner most what the food touches epithelium, laminar propria, muscularis mucosa (circular or spiracle)

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5
Q

What 3 layers are present in the mucosa?

A
  1. epithelium
  2. lamina propria (glands, lymphatics, capillary plexus- large intestine only contains lymphatics)
  3. muscularis mucosa (smooth muscle- circular or spiral)
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6
Q

State what type of epithelium is present in the following:

  1. oseophagus
  2. pyloric spincter
  3. stomach
  4. small intestine
  5. large intestine
A
  1. stratified non-keratinesed epithelium
  2. inner muscularis layer
  3. simple columnar
  4. simple columnar with microvilli +goblet cells
  5. simple columnar + rela. more goblet cells
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7
Q

What cell type is present in the stomach antrum and what does it secrete?

A

G-cells, gastrin

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8
Q

1) name the organs with 2 layers of muscle in the muscularis externa?

A

oseophagus, small intestine, large intestine

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9
Q

How many layers of muscles are in the muscularis externa of the stomach ?

A

3

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10
Q

What cell type is present is mesothelium?

A

simple squamous epithelium

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11
Q

In the oesophagus, what do the muscularis externa?

A

peristaltic movement

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12
Q

What glands are present in the following:

  1. oseophagus
  2. stomach
  3. small intestine (duodenum)
  4. large intestine
A
  1. submucosal seromucous glands ( NO gastric glands)
  2. gastric glands
    3 Bunner’s glands (submucosal glands) and mucosal glands in crypts of lieberkuhn
  3. mucosal glands in crypts of lieberkuhn
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13
Q

What is the function of the crypts?

A

stem cells

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14
Q

What is present in the muscularis externa of the intestine?

A

Myenteric plexus

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15
Q

What cell types are present in the gastric gland?

A
  1. parietal cells
  2. mucous secreting cells
  3. chief cells
  4. enteroendocrine APUD cells
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16
Q

What do the following cell types excrete:

  1. parietal cells
  2. mucous secreting cells
  3. chief cells
  4. enteroendocrine APUD cells
A
  1. HCL& KCl, intrinsic factor
  2. mucous
  3. pepsinogen, renin and lipase
  4. polypeptide hormones

stage 1 Gastrointestinal tract (12 decks)

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