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GI system anatomy > Epithelia of stomach > Flashcards

Epithelia of stomach Flashcards

1
Q

What are the types of simple columnar cells in the stomach?

A

Surface mucous cells

Mucous neck cells

Parietal cells

Chief cells

Enteroendocrine cells

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2
Q

What are the types of enteroendocrine cells in the stomach?

A

G cells

D cells

Enterochromaffin cells

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3
Q

What is the function of the surface mucous cells?

A

Produce mucus

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4
Q

What does mucus in the stomach contain?

A

Contains bicarbonate ions

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5
Q

What are the functions of mucus in the stomach?

A

Physical barrier between epithelia of stomach and acid of stomach, to protect the epithelia

Neutralises the acidity of the stomach

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6
Q

What is the function of the mucous neck cells?

A

Same as surface mucous cells

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7
Q

What is the function of parietal cells?

A

Produce hydrochloric acid

Produce intrinsic factor

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8
Q

What is the function of hydrochloric acid in the stomach?

A

Gives optimum pH for protease enzymes in the stomach

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9
Q

What is the function of chief cells in the stomach?

A

Produce pepsinogen

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10
Q

What is pepsinogen?

A

Inactive form of pepsin

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11
Q

What is the function of enterochromaffin cells in the stomach?

A

Produce histamine

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12
Q

What is the function of G cells in the stomach?

A

Produce gastrin hormone

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13
Q

What is the function of D cells in the stomach?

A

Produce somatostatin

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14
Q

What are gastric pits and gastric glands?

A

Depressions in wall of stomach
out of lumen

gastric pits towards the top
gastric glands towards the bottom

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15
Q

What epithelial cells line gastric pits?

A

Surface mucous cells

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16
Q

What epithelial cells line gastric glands?

A

Towards the top are mucous neck cells
then parietal cells
then chief cells
then enteroendocrine cells towards the bottom

17
Q

How are the different types of epithelial cells distributed throughout the different parts of the stomach?

A

Cardia

  • mainly surface mucous cells
  • mucous neck cells

Fundus and body

  • mainly surface mucous cells
  • mucous neck cells
  • parietal cells
  • chief cells

Pylorus
-mainly enteroendocrine cells

GI system anatomy (21 decks)

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