Functions of GIT

Question 1

What are the functions of the GIT?

Answer 1

1. Digestion of food
2. Absorption of nutrients
3. Excretion of waste
4. Prevention of invasion by pathogens
5. Contains microbiome

Question 2

How is the secretion of gastric acid triggered?

Answer 2

1. Histamine from ECL cells - stimulate H+/K+ ATPase pump on parietal cells
2. Gastrin from G cells - stimulate histamine
3. Ach from vagus - stimulates histamine