Lower GI Histology with Accessory Organs Flashcards Preview

Digestive, Endocrine, and Metabolic Systems > Lower GI Histology with Accessory Organs > Flashcards

Flashcards in Lower GI Histology with Accessory Organs Deck (17):
1

What is the food bolus called when it reaches the duodenum?

Chyme

2

What small-intestine cells contain large, pink granules?

Paneth cells (the granules being the defensins)

3

Brunner's glands are found only in the ____________. What do they secrete?

duodenum; bicarb

4

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.

5

In general, villi are most dense in the ____________ and least dense in the ______________.

proximal small intestine (duodenum); distal small intestine (ileum)

6

Most intestinal enzymes are secreted by the pancreas. What is the big exception?

Enterokinase

7

True or false: most of the pancreas is endocrine glands.

False! 98% is exocrine!

8

The plicae circulares are most developed in the ______________.

jejunum

9

Chymotrypsin prefers what type of amino acids to digest?

Aromatic

10

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.

11

Cholecystokinin and secretin act on ____________ cells.

acinar (to induce secretion of zymogens)

12

Cholecystokinin is also called _____________.

pancreozymin

13

What sphincter is at the juncture of the hepatopancreatic duct and the duodenum?

The sphincter of Oddi

14

Brunner's cells are in the _______________.

submucosa of the small intestine

15

The microvillar surface of the small intestine is called ________________.

the brush border

16

The major enzymes secreted by the pancreas are ___________________.

trypsin, chymotrypsin, elastase, carboxypeptidase, and triacylglycerol lipase

17

Why do those with lactose-intolerance get diarrhea from dairy?

Because the lactose goes undigested and bacteria in the colon eat it and divide

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