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Packet 12: Bonus 15

Infection by Helicobacter pylori can lower the pH of this substance, leading to the formation of gastric ulcers. For 10 points each:
[10m] Name this alkaline substance secreted by foveolar cells in the stomach. This slippery substance lines the stomach and protects it from its own acid.
ANSWER: mucus [accept alkaline mucus; accept mucous membrane; accept gastric mucosa]
[10h] The maintenance of mucous membranes is supported by niacin and this fat-soluble vitamin. The “all-trans” form of a metabolite of this vitamin activates the protein rhodopsin.
ANSWER: vitamin A [accept vitamin A1 or all-trans-retinol; accept all-trans-retinal; accept all-trans-retinoic acid]
[10e] Accumulation of thick mucus in the lungs can result from the impaired secretion of this element’s anion in cystic fibrosis patients. This element and sodium form table salt.
ANSWER: chlorine [or Cl; accept chloride or Cl-]
<Editors, Biology> | Packet L

EditionsHeardPPBEasy %Medium %Hard %
210618.30100%52%31%

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Conversion

TeamOpponentPart 1Part 2Part 3TotalParts
BristolOxford001010E
Cambridge BCambridge A1001020ME
Cambridge CWarwick1001020ME
Cambridge DBirmingham1001020ME
CardiffSouthampton1001020ME
Imperial AImperial B1001020ME
Imperial CImperial D001010E
LSECambridge E001010E

Summary

TournamentEditionExact Match?HeardPPBEasy %Medium %Hard %
UK (North)UKY518.00100%20%60%
UK (South)UKY816.25100%63%0%
Southern CaliforniaUSY717.14100%43%29%
Eastern Canada (2)USY916.67100%33%33%
Great LakesUSY1221.67100%67%50%
Lower Mid-AtlanticUSY618.33100%50%33%
Upper Mid-AtlanticUSY1220.83100%67%42%
MidwestUSY918.89100%56%33%
NortheastUSY1215.00100%25%25%
PacificUSY916.67100%44%22%
SoutheastUSY1219.17100%58%33%
Upstate NYUSY520.00100%100%0%