Lymphocytes proliferate in relatively permanent si

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Gastrointestinal System Quiz Questions Questions

Question 1 of 5

Lymphocytes proliferate in relatively permanent sites in connective tissue which contain germinal centers surrounded by dense concentrations of incoming and outgoing cells. These sites are called:

A. sinusoids B. crypts C. villi D. lymph nodules

Correct Answer: D

Rationale: Lymph nodules are sites of lymphocyte proliferation within mucosa, distinct from lymph nodes.

Question 2 of 5

Choose the best description of the fundic stomach.

A. Mucosa without villi, but thick and densely packed with tubular glands containing several distinct cell types; epithelium apparently consisting of a single cell type lining surface and pits; lamina propria with numerous lymph nodules B. Mucosa without villi, but thick and densely packed with tubular glands containing several distinct cell types; epithelium apparently consisting of a single cell type lining surface and pits; lamina propria inconspicuous C. Mucosa with villi, thick and densely packed with tubular glands containing several distinct cell types; epithelium apparently consisting of a single cell type lining surface and pits; lamina propria inconspicuous D. Mucosa with villi, thick and densely packed with tubular glands containing several distinct cell types; epithelium with scattered goblet cells lining surface and pits; lamina propria inconspicuous

Correct Answer: B

Rationale: The fundus has no villi, with glands (parietal, chief cells) and a uniform surface epithelium.

Question 3 of 5

Which of the following regions of the GI tract is characterized by short tubular invaginations (crypts or pits) which are not lined by dividing, differentiating cells?

A. esophagus B. stomach C. duodenum D. jejunum

Correct Answer: B

Rationale: Gastric pits in the stomach lack stem cells, unlike intestinal crypts.

Question 4 of 5

Ducts may be distinguished from secretory tissue because cells lining ducts:

A. form a stratified epithelium B. have nuclei located basally rather than apically C. are usually much larger than secretory cells D. lack apical vesicles and other evidence of cell specialization for synthesizing and storing secretory product

Correct Answer: D

Rationale: Duct cells lack secretory vesicles, focusing on transport rather than secretion.

Question 5 of 5

Intestinal crypts of LieberkÃ¼hn are located:

A. in the mucosa of the small intestine B. in the submucosa of the small intestine C. in the serosa of the small intestine D. deep to the wall of the small intestine proper

Correct Answer: A

Rationale: Crypts of LieberkÃ¼hn are mucosal glands in the small intestine.

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Lymphocytes proliferate in relatively permanent sites in connective tissue which contain germinal centers surrounded by dense concentrations of incoming and outgoing cells. These sites are called:

Nurselytic

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Gastrointestinal System Quiz Questions Questions

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