Secretions in the GIT

Question 1

Mucous cells in the GIT secrete ________

Answer 1

Mucus

Question 2

G-cells in the GIT secrete___________

Answer 2

Gastrin

Question 3

Parietal cells in the GIT secrete ___________ and ___________

Answer 3

Hydrochloric acid and Intrinsic factor

Question 4

Chief cells in the GIT secrete ____________

Answer 4

Pepsinogen

Question 5

Parietal cells are also called __________

Answer 5

Oxyntic cells

Question 6

Chief cells are also called ___________

Answer 6

Peptic cells

Question 7

Gastrin is secreted from G-cells in response to _____________

Answer 7

Stretch from food entering the stomach

Question 8

Parietal cells produce secretion in response to ____________

Answer 8

Stimulation by gastrin

Question 9

____________ is converted to pepsin in the presence of _____________

Answer 9

Pepsinogen
HCL

Question 10

___________, _____________ and _____________ are the phases of gastric acid secretion

Answer 10

Cephalic
Gastric
Intestinal

Question 11

Secretion of acid in response to sight, smell, or thought of food occurs in what phase?

Answer 11

Cephalic phase

Question 12

Secretion of acid in response to entry of food into the stomach occurs in what phase?

Answer 12

Gastric phase

Question 13

What phase of gastric acid secretion maintains gastric secretion and motility?

Answer 13

Gastric phase

Question 14

Secretion of acid in response to food entering/distending the duodenum occurs in what phase?

Answer 14

Intestinal phase

Question 15

What phase of gastric acid secretion inhibits gastric secretion and motility?

Answer 15

Intestinal phase

Question 16

_____________ is a hormone secreted in the small intestine to inhibit gastrin release?

Answer 16

Cholecystokinin (CCK)

Question 17

What is sham feeding?

Answer 17

This is a process whereby food eaten doesn’t get to the stomach

Question 18

Explain the mechanism of HCL production in the stomach

Answer 18

CO2 and H2O from the blood combine to form carbonic acid [H2CO3] in the presence of Carbonic anhydrase.
Carbonic acid splits into H+ and Bicarbonate [HCO3-]
Hydrogen moves into the lumen through diffusion
Cl- from the blood is pumped actively into the lumen as Bicarbonate is pumped into the blood