overview of GI

Question 1

four roles of GIT

Answer 1

digestion
absorption
secretion
motility

Question 2

four layers

Answer 2

mucosa (epithelium, lamina propria, muscularis mucosae), submucosa, muscualris externa, serosa (peritoneal cavity)/adventitia

Question 3

what does mucosa do?

what is found in it

Answer 3

barrier, synthesizes n secretes enzymes, hormones and mucus to digest, absorbs nutrients
lamina propria is loose connective tissue
contains LN, BV, glands

Question 4

submucosa?

Answer 4

dense, irregular connective tissue

has nerves, bv, ln, submucosal glands in the oe and duo

Question 5

which plexus lies on the submucosal layer?

Answer 5

submucosal/meisseners plexus

Question 6

muscularis externa?

Answer 6

comprised of circular (inner) and longitudinal (outer) muscles layers

Question 7

which plexus lies between the muscle layers?

Answer 7

mesenteric/auerbachs plexus

Question 8

name which plexus is long and which is a short reflexe

Answer 8

mesenteric plexus = enteric/short reflexes

submucosal= paasympathetic/long reflexes

Question 9

sympathetic and parasympathetic supply?

Answer 9

symp= splanchnic 
para= vagus