A 38-year-old man comes to the clinic complaining of recurrent abdominal pain for the past 2 months. He reports a gnawing, dull pain at the epigastric region that improves with oral ingestion. He has been taking calcium carbonate for the past few weeks; he claims that “it used to help a lot but it’s losing its effects now.” Laboratory testing demonstrated increased gastrin levels after the administration of secretin. A push endoscopy visualized several ulcers at the duodenum and proximal jejunum. What characteristics distinguish the jejunum from the duodenum?
ALack of goblet cells
BCrypts of Lieberkuhn
CLack of submucosal Brunner glands
DPeyer patches
EPlicae circulares
Which of the following cells in the body depends on dynein for its unique functioning?
ASmall intestinal mucosal cell
BSkeletal muscle cell
CAdipocyte
DLower esophageal mucosal cell
EFallopian tube mucosal cell
A 40-year-old female comes in with several months of unintentional weight loss, epigastric pain, and a sensation of abdominal pressure. She has diabetes well-controlled on metformin but no other prior medical history. She has not previously had any surgeries. On physical exam, her doctor notices brown velvety areas of pigmentation on her neck. Her doctor also notices an enlarged, left supraclavicular node. Endoscopic findings show a stomach wall that appears to be grossly thickened. Which of the following findings would most likely be seen on biopsy?
AKeratin pearls
BNoncaseating granulomas
CPeyer's patches
DPsammoma bodies
ECells with central mucin pool
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