Multiple choice

Brunner's glands function in protecting duodenum from acidic chyme by secreting alkaline mucus rich in bicarbonate. Brunner's glands are located in the

  1. intestinal epithelium of duodenum

  2. muscularis externa of duodenum

  3. submucosa of duodenum

  4. lamina propria of duodenum
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C Correct answer
Explanation

Brunner's glands are located in the submucosa of duodenum. Their  function is to protect duodenum from acidic chyme by secreting alkaline mucus rich in bicarbonate. They also secrete urogastrone, which inhibits chief cells and parietal cells from secreting HCL and other acidic enzymes.

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