Overview of GI Physiology

Question 0

Secretion of saliva

Answer 0

Hypotonic

Question 1

There should be no retro movement in the intestine

Answer 1

Purpose of valves, sphincters

Question 2

Relationship of variables

Answer 2

As the rate of flow of saliva increases
K remains constant
Bicarbonate increases
Sodium and chloride increases

Question 3

Saliva

Answer 3

Predominantly neural

Question 4

Parts of the stomach

Answer 4

Cardia: mucus and HCO3, prevention of reflux, entry of food, regulation of belching
Fundus and body: H+, imtrinsic factor, mucus, HCO3, pepsinogens, lipase
Antrun and pylorus: grinding

Question 5

Remember! Functions of the different gastric cells
Chief cells - pepsinogen - breaks peptide bonds
Parietal cells - HCl - kills microbes

Answer 5

Study

Question 6

Examples of PPIs

Answer 6

Study anti-histamines

Question 7

Histamine

Answer 7

Strong agonist for acids

PPI - strongest antagonist

Question 8

If secretin is the pancreatic secretion

Answer 8

Secretion is fluid rich in HCO3

Question 9

Secretions of the colon

Answer 9

Aqueous component is high in K+ and HCO3 - hypokalemia and acidosis