Human Digestive System · NCERT Biology

Brunner's glands, which help in neutralizing gastric acid, are located in the:

  1. Mucosa of the stomach
  2. Sub-mucosa of the duodenum
  3. Mucosa of the esophagus
  4. Sub-mucosa of the colon
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Correct answer: Sub-mucosa of the duodenum

Brunner's glands are unique to the sub-mucosal layer of the duodenum. They secrete an alkaline mucus that protects the intestinal wall from the highly acidic chyme arriving from the stomach.

Difficulty: Medium Question 14 of 20

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