cells and hormones of the digestive system

Question 1

Chief cells

Answer 1

secrete pepsinogen
HCl then activates into pepsin
hydrolysis of polypeptides

Question 2

Goblet cells

Answer 2

produce mucus

Question 3

Parietal cells

Answer 3

secrete HCl
secrete intrinsic factor

Question 4

HCl in parietal cells

Answer 4

1. destroy pathogens
2. denature proteins
3. activate pepsinogen into pepsin

Question 5

Intrinsic factor in parietal cells

Answer 5

necessary to absorb vit B12 (in small intestine)
-makes DNA
-myelinate neurons
-RBC formation

Question 6

enteroendocrine cells

Answer 6

gastrin —-> G-cells
increase gastric acid (HCl) secretion
increase stomach motility (activity)

Question 7

gastrin

Answer 7

hormone which stimulates the secretion of gastric acid
increases stomach motility

Question 8

S cells

Answer 8

cells which release secretin

Question 9

I cells

Answer 9

stimulated by fat in the chyme
release cholecystokinin

Question 10

cholecystokinin

Answer 10

causes gall bladder to contract and release bile
slow release of chyme into duodenum = more time to digest fat

Question 11

chyme

Answer 11

partially digested food + acid

Question 12

secretin

Answer 12

hormone which stimulates pancreatic juices