GI Tract 2

Question 1

Esophagus - strat squam ep.

Loose CT

Answer 1

mucosa

Question 2

dense irregular CT

sebacous glands

Answer 2

submucosa

Question 3

upper portion = skeletal muscle, voluntary

lower portion = smooth muscle, involuntary

Answer 3

muscularis externa

Question 4

Stomach - simple columnar ep.

Answer 4

mucosa

Question 5

apical ep. secretion

Answer 5

mucous, acid, proteases

Question 6

basal ep. secretion

Answer 6

hormones, paracrine factors

Question 7

thickening; @ cardiac and pyloric openings = sphincters

Answer 7

muscularis externa

Question 8

strat squam –>cuboidal

Answer 8

gastro-esophageal junction

Question 9

secrete zygomens; actiivated by acid hydrolysis (pepsin)

Answer 9

chief cells

Question 10

secrete peptides - increase peristalsis

secrete gastrin - releases pyloric sphincter

Answer 10

DNES cells

Question 11

absorptive mucosa
simple columnar, goblet cells, paneth cells, loose CT
lacteal

Answer 11

small intestine

Question 12

mucous secretions “Brunner’s Glands” protects acid from stomach

Answer 12

submucosa

Question 13

absorptive, no villi, crypts/glands

Answer 13

mucosa of large intestine

Question 14

no Brunner’s glands

Answer 14

submucosa of large inestine

Question 15

anal sphincters, smooth muscle internally, skeletal muscle extrenally

Answer 15

muscularis externa

Question 16

simple columnar –> strat squam

Answer 16

rectum –> anus