DIGESTIVE

Question 1

6 functions of the digestive system

Answer 1

ingestion secretion motility digestion absorption defecation

Question 2

deepest layer of the gi tract

Answer 2

mucosa

Question 3

rate of renewal of gi tract epithelial cells

Answer 3

5-7 days

Question 4

areolar ct containing many blood and lymphatic vessels

Answer 4

lamina propria

Question 5

thin layer of smooth muscle fibers which increase the surface area for digestion and absorption

Answer 5

muscularis mucosae

Question 6

layer of gi tract that consists of areolar ct that binds the mucosa to the muscularis

Answer 6

submucosa

Question 7

produces voluntary swallowing and forms the external anal sphincter which permits voluntary control of defecation

Answer 7

skeletal muscles

Question 8

generally found in two sheets: circular fibers and longitudinal fibers; muscularis of the rest of the gi tract

Answer 8

smooth muscles

Question 9

helps break down food, mix with digestive secretions, and propel it along the tract

Answer 9

involuntary contraction

Question 10

second plexus of neurons found between the layers of muscularis

Answer 10

myenteric plexus

Question 11

superficial layer of the gi tract that is suspended in the abdominal cavity

Answer 11

serosa

Question 12

what organ lacks a serosa

Answer 12

esophagus

Question 13

single layer of areolar ct that forms the superficial layer of the esophagus

Answer 13

adventitia

Question 14

brain of the gut. intrinsic set of nerves

Answer 14

enteric nervous system

Question 15

neurons of the ens can function independently as it is subjected by the neurons of this system

Answer 15

autonomic ns

Question 16

nerves that supply parasympathetic fibers to most parts of the gi tract

Answer 16

vagus nerves