Question
Transit-amplifying cells migrate from these structures to replenish the villus epithelium. For 10 points each:
[10h] Name these populations of intestinal stem cells. LGR5+ cells located at these pitted structures can also differentiate in +4 cells and Paneth cells.
ANSWER: intestinal crypts [or colonic crypts; accept crypts of Lieberkühn; prompt on intestinal glands; prompt on stem-cell niches]
[10m] After migrating from the crypt, transit-amplifying cells will mature into one of four cell types, including this cell type involved in lubricating the epithelium. Most of the mucin (“MEW-sin”) found in the human body is produced by these cells.
ANSWER: goblet cells
[10e] Transit-amplifying cells can also differentiate into cells called enterocytes (“EN-tair-roe-SITES”) that facilitate this molecule’s uptake using a sodium cotransporter. This molecule is converted into pyruvate during glycolysis.
ANSWER: glucose [accept sodium-glucose transporter; prompt on sugars or saccharides; prompt on carbohydrates]
<Kane Nguyen, Biology>
Summary
| 2024 Penn Bowl UNC | 10/26/2024 | Y | 3 | 16.67 | 100% | 33% | 33% |
Data
| RIT A | UNC A | 0 | 0 | 10 | 10 |
| Duke A | UNC B | 10 | 10 | 10 | 30 |
| Virginia Tech A | UNC C | 0 | 0 | 10 | 10 |