Flashcards in Lower GI Histology with Accessory Organs Deck (17):
What is the food bolus called when it reaches the duodenum?
What small-intestine cells contain large, pink granules?
Paneth cells (the granules being the defensins)
Brunner's glands are found only in the ____________. What do they secrete?
Describe the basic role of M cells.
They ingest antigenic components and present it to macrophages and lymphocytes on the inner surface of the GI tract.
In general, villi are most dense in the ____________ and least dense in the ______________.
proximal small intestine (duodenum); distal small intestine (ileum)
Most intestinal enzymes are secreted by the pancreas. What is the big exception?
True or false: most of the pancreas is endocrine glands.
False! 98% is exocrine!
The plicae circulares are most developed in the ______________.
Chymotrypsin prefers what type of amino acids to digest?
Describe the layout of the centroacinar and acinar cells.
The centroacinar cells line the duct leading to the pancreatic cul-de-sac, and the acinar cells form the pancreatic cul-de-sac.
Cholecystokinin and secretin act on ____________ cells.
acinar (to induce secretion of zymogens)
Cholecystokinin is also called _____________.
What sphincter is at the juncture of the hepatopancreatic duct and the duodenum?
The sphincter of Oddi
Brunner's cells are in the _______________.
submucosa of the small intestine
The microvillar surface of the small intestine is called ________________.
the brush border
The major enzymes secreted by the pancreas are ___________________.
trypsin, chymotrypsin, elastase, carboxypeptidase, and triacylglycerol lipase