Digestive System

Question 1

Upper GI

Answer 1

Esophagus and Stomach

Question 2

Motility & Peristalsis

Answer 2

Motility is movement of the anatomical structures that allow contents to pass thru.

Peristalsis is the muscle action of the GI system that pushes food thru the body during digestion.

Question 3

Liver and Gall bladder

Answer 3

Liver produces bile

Bile is stored in the Gall bladder.

Gall bladder releases bile into the stomach at the duodenum.

Question 4

Chyme

Answer 4

Food mixed with digestive juices.

Question 5

Small Intestines components

Answer 5

Duodenum: has ducts linking the pancreas, liver & gall bladder.

Jejunum

ileum

Absorption of carbs, protein (aminos), lipids, calcium & iron occur in the duodenum & jejunum.

Absorption of salts, water, vitamins & electrolytes occur in the ileum.

Question 6

Enteric Nervous System

Answer 6

The nervous system in the GI tract. As many nerves in small intestines as in the entire spinal cord. Can work on its own w/o input from the CNS.

Question 7

Lower GI

Answer 7

The colon. Serves to absorb electrolytes, water and vitamins & has little to no digestive power. *Most fluid is absorbed in small intestines.

Question 8

Colon description and flow

Answer 8

From right, counterclockwise

Cecum: Receives chyme from ielum.

Ascending colon

Transverse colon

Descending colon

Sigmoid colon

Exe improves transit time