ch 21 and 24

Which is an accessory organ of digestion?

• pancreas

• colon

• spleen

• esophagus

Which is the sequence of layers from the lumen to the outer wall of the digestive tract?

• mucosa, submucosa, serosa, muscularis extern

• serosa, submucosa, mucosa, muscularis externa

• mucosa, submucosa, muscularis externa, serosa

• submucosa, muscularis externa, serosa, mucosa

The lamina propria and mucous epithelium are parts of the

Contraction of the ________ alters the surface area by moving villi.

• muscularis mucosae

• mucosa

• submucosa

• submucosal plexus

Between the layer of circular and longitudinal muscle in the muscularis externa is the

• mucosa

• submucosa

• myenteric plexus

• submucosal plexus

Peyer's patches are found in the

The three sections of the small intestine, in order according to movement of its contents, are

• duodenum, jejunum, ileum

• jejunum colon, ileum.

• duodenum, ileum, jejunum.

• jejunum, ileum, colon.

What is the "migrating motor complex"?

• Alternating patterns of electrical activity that stimulate the longitudinal and then the circular layer of smooth muscle throughout the GI tract

• Movement, or migration, of food from the mouth into the stomach

• pattern of slow contractions sweeping along the GI tract

• A shift of smooth muscle cells from the circular to the oblique layer in the stomach

Secretion refers to the

• absorption of nutrients in the gut.

• input of food into the digestive tract.

• breakdown of food into particles small enough to cross epithelial cells.

• release of substances into the lumen of the gut.

The ________ is a significant site of absorption of water and electrolytes, but NOT of nutrients.