NBME 21 Area labeled 'B' (Parietal cell) (NBME Answers)

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Retired NBME 21 Answers

nbme21/Block 1/Question#36 (reveal difficulty score)
A 51-year-old woman comes to the physician ...
Area labeled 'B' (Parietal cell) 🔍 / 📺 / 🌳 / 📖
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+20 upvote downvote
submitted by ∗h0odtime(54)

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Gastrin released by G Cells pyloric antrum, duodenum, stomach stimulates parietal cells to secrete HCl.
Parietal Cells (Fundus + Cardia) epithelial cells that secrete HCl and intrinsic factor. They activate gastric chief cells to secrete digestive enzymes.
Gastric Chief Cells (Mucosa): releases pepsinogen and chymosin

Labels

A Mucous Neck Cell
B Nucleus of Parietal Cell
C Nucleus of Chief Cell
D Nucleus of Endothelial Cell
E Nucleus of Fibroblast

Credit to Histo_Man/reddit

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lovebug THX for kindful Lables! +1

+9 upvote downvote
submitted by ∗mcl(671)

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This image is very helpful.

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seagull http://www.siumed.edu/~dking2/erg/GI178b.htm Another histology slide with labels +3

masonkingcobra I like to think that the parietal cells look like "fried eggs" classically +3

+5 upvote downvote
submitted by ∗seagull(1933)

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http://www.siumed.edu/~dking2/erg/GI178b.htm

Another histology slide with labels a few seconds ago

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enbeemee what are the other labeled structures? i can discern the parietal and chief cells, but not really the others... +1

hyperfukus yea wth is A +1

+0 upvote downvote
submitted by enbeemee(12)

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what are the other labeled structures? i can discern the parietal and chief cells, but not the others...

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hyperfukus what is A? +

et-tu-bromocriptine According to this source, they're mucous neck cells (secrete acidic fluid containing mucin); compare this with mucus produced by surface mucous cells, which is alkaline. http://www.siumed.edu/~dking2/erg/GI082b.htm +2

hyperfukus i gosh i see now! thanks so much :) so if it's Pink=Parietal but not granules got it thank you :) +

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