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Questions and Answers
Which structure is responsible for increasing the surface area for absorption in the small intestine?
Where are Villi found in the gastrointestinal tract?
Which part of the small intestine has Brunner’s glands in its submucosa?
What is the function of Intestinal crypts (gland) in the small intestine?
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Where are Microvilli (Brush border) present?
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Which part of the small intestine lacks both Brunner’s glands and Peyer’s patches?
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Which one of the following is present ONLY in ileum?
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M cells can lead to the secretion of:
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Crypts of Lieberkühn are present at:
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Which one of the following cells covers the villi?
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Paneth cells are present at:
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Which layer of the small intestine contains Peyer's patches?
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Study Notes
Small Intestine Structure
- The villi structure is responsible for increasing the surface area for absorption in the small intestine.
- Villi are found in the small intestine, specifically in the mucosa layer.
Brunner's Glands
- Brunner's glands are found in the duodenum, the first part of the small intestine.
- These glands are present in the submucosa layer.
Intestinal Crypts
- Intestinal crypts, also known as intestinal glands, are found in the small intestine.
- The function of intestinal crypts is to produce digestive enzymes and mucus.
Microvilli
- Microvilli, also known as the brush border, are present on the apical surface of enterocytes.
- Microvilli increase the surface area for absorption in the small intestine.
Regions of the Small Intestine
- The jejunum is the part of the small intestine that lacks both Brunner's glands and Peyer's patches.
- Peyer's patches are found in the ileum, the last part of the small intestine.
- M cells in Peyer's patches can lead to the secretion of antibodies.
Crypts of Lieberkühn
- Crypts of Lieberkühn are present at the base of the villi.
- These crypts contain stem cells that differentiate into enterocytes.
Villi Epithelium
- The epithelium of the villi is covered by enterocytes.
- Enterocytes are responsible for the absorption of nutrients in the small intestine.
Paneth Cells
- Paneth cells are found at the base of the crypts of Lieberkühn.
- Paneth cells contain lysozyme and help with the defense against bacteria.
Peyer's Patches
- Peyer's patches are found in the mucosa layer of the ileum.
- Peyer's patches are responsible for the immune response in the small intestine.
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Description
Test your knowledge of the microscopic structure of the small intestine, including the duodenum, jejunum, and ileum. Learn about the regional differences and cell types present in the small intestine mucosa.
