GI motility

Question 1

what are phasic contractions?

Answer 1

peristalsis

Question 2

what are tonic contractions?

Answer 2

mainly the sphincters, usually active

Question 3

a vagotomy will affect which part of the esophagus?

Answer 3

only the upper 3rd with striated muscle

Question 4

why does vagotomy not affect the lower 2/3rd of the esophagus

Answer 4

the smooth muscle present will no longer have vagus input but it will still respond to local signals like distension

Question 5

What are the symptoms of gerd?

Answer 5

acid reflux, heartburn, hiatal hernia, pregnancy, failure of secondary peristalsis

Question 6

are parietal and oxyntic the same?

Answer 6

yes

Question 7

stomach relaxation is a vagovagal stimulated path: t or f:

Answer 7

true

Question 8

will interstitial cells of cajal change the frequency of contractions or the strength?

Answer 8

changes the strength and causes a longer plateau period

Question 9

particles must be smaller than what size to pass to small bowel?

Answer 9

less than one cubic milimeter

Question 10

what is responsible for the migrating motor copmlex?

Answer 10

modulin, every 90 minutes which allows for clearing in a fasting person, disappears when a person eats