1. Where does the ENS begin
2. How many neurones are there in the ENS
3. Why are gut transplants so successful
4. What neurotransmitters are used in the ENS, which is used for sphincter relaxation by Psymp
5. What are two paracrine molecules
6. What type of hormone are all GI hormones
7. What do duodenal S cells secrete, what do they secrete it in response to, who discovered it and what does it do and protect
8. Which cells secrete Gastrin ,where are they, when do they release it and what does it do
9. What do the duodenal and jejunal I cells secrete, what is it secreted in response to and what does it do
10. What are the 2 incretins and what do they do
11. What is motilin secreted by and what does it initiate
12. Which is the only hormone that stimulates appetite at the hypothalymus and promotes ant pituitary HGH release
13. Where is PYY secreted and what are its two functions
14. What is potentiation
15. What are the 4 functions of saliva
16. What 4 defence molecules are found in saliva
17. Which cells produce the primary secretion and what is its osmolality compared to plasma, by what mechanisms are the Na+ and Cl- transported
18. Which cells empty the saliva into the ducts
19. How is the primary secretion modified in the ducts
20. Does reabsorption exceed secretion or vice versa