GI secretions

Question 1

Which cells secrete pepsinogen?

Answer 1

Peptic (chief) cells

Question 2

Which cells secrete intrinsic factor?

Answer 2

Parietal cells

Question 3

Which cells secrete mucous?

Answer 3

Mucous cells

Question 4

Which cells secrete acid?

Answer 4

Parietal calls

Question 5

What stimulates gastric acid production?

Answer 5

Stimulation of fastric glands via acetylcholine release
Gastrin
Histamine

Question 6

What inhibits gastric acid production?

Answer 6

Gastrin inhibited when pH falls to around 2-3
Somatostatin
Secretin
CCK and GIP

Question 7

What increases rate of emptying?

Answer 7

Gastric volume
Proteins (amino acids stimulate gastrin > increased contractility)

Question 8

What decreases rate of gastric emptying?

Answer 8

Increased acidity in duodenum
Hypertonic chyme

Question 9

How much saliva is secreted?

Answer 9

1.5L

Question 10

How much gastric acid is secreted?

Answer 10

2-3L

Question 11

How much is secreted from gall bladder?

Answer 11

500mL

Question 12

How much is secreted from pancreas?

Answer 12

1.5L

Question 13

How much is secreted from small bowel?

Answer 13

1.5L

Question 14

How much is excreted from large bowel?

Answer 14

100mL