Multiple choice

In which part of the intestine of mammals are M cells found?  

  1. In the dome area of Peyer's patches

  2. In the pyloric antrum

  3. In the follicles of the Peyer's patches

  4. In the lamina propria

  5. Interacting with intraionthelial lymphocytes

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A Correct answer
Explanation

Peyer's patches are covered by specialized epithelium (follicle-associated epithelium). Some of these epithelial cells have surfaces, which seem folded under the scanning electron microscope. These microfold, or M, cells sample and actively transport particulate antigens from the lumen into the dome area, where priming of both T and B lymphocytes occurs.

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