digestive stuff

Question 1

how do water soluble vitamins enter circ? fat soluble?

Answer 1

water= hepatic portal vein –> liver –> systemic circ

fat soluble –> absorbed into lacteals –> thoracic duct –> enter circulation at subclavian vein –> systemic circ

Question 2

gastrin

Answer 2

increase H+

g cells in antrum, duodenum

Question 3

somatostatin

Answer 3

decrease secretion of most GI hormones

d cells (pancreatic islets, gut mucosa)

Question 4

CCK

Answer 4

inc pancreatic enzyme
inc HCO3

I cell (small I)

Question 5

secretin

Answer 5

inc pan HCOs
dec gastric H+

S cells (small i)

Question 6

motilin

Answer 6

inc GI motility

M cells (small I)