Brunner's glands are located in the:
Apancreas, where they release insulin
Bliver, where they produce bile
Cduodenum, where they secrete alkaline mucus
Dstomach, where they secrete pepsin
Answer & Solution
Correct answer: C. duodenum, where they secrete alkaline mucus
1. Brunner's glands sit in the wall of the duodenum, the first part of the small intestine.
2. They secrete an alkaline mucus.
3. That mucus neutralises the acidic chyme arriving from the stomach and protects the duodenal lining.
4. Neutralising the acid also raises the pH to the range the pancreatic and intestinal enzymes need.
5. Placing them in the pancreas or liver leads to answers about insulin and bile, both recorded and both wrong.
_Source: NECTA ACSEE 2023 Biology 133/1, Question 6: Nutrition_