Gastric Motility and Secretion

Question 1

In which portion of the stomach is the muscle wall thicker?

Answer 1

Antrum

Question 2

What generates peristaltic rhythm?

Answer 2

Pacemaker cells in longtitudinal muscle layer

Question 3

How are slow waves conducted?

Answer 3

Through Gap Jx

Question 4

what are slow waves?

Answer 4

spontaneous depol/repolorisation

Question 5

What is gastrins effect on muscle contraction?

Answer 5

Increases

Question 6

What does Distention of the stomach cause?

Answer 6

Long/Short Reflexes -> inc contraction

Question 7

Which glands release Bicarcobonate?

Answer 7

Brunners gland (submucosal glands) in DD

Question 8

What do duct cells of the panc secrete?

Answer 8

Bicarbonate

Question 9

What do acinar cell in the panc prod?

Answer 9

digstive enzymes

Question 10

What converts trypsinogen to trypsin?

Answer 10

Enterokinase

Question 11

What is trypsins fx?

Answer 11

Convert all other zymogens to active

Question 12

What is the fx of proteases?

Answer 12

cleve peptide bonds

Question 13

What is the fx of nucleases?

Answer 13

hydrolyse `dna/rna

Question 14

What is fx of elastase?

Answer 14

Collagen digestion

Question 15

fx of phospholipidases?

Answer 15

phospoholipids to fatty acids

Question 16

fx of lipases?

Answer 16

triglycerides to fatty acids and glycerol

Question 17

fx of alpha amylase?

Answer 17

starch to maltose and glucose

Question 18

what stims the release of zymogens from panc?

Answer 18

CCK

Question 19

what is cck release triggered by?

Answer 19

Fatty acid a.a in DD, neuronal control