Microanatomy: GI tract 3: major accessory organs (liver, biliary system, pancreas)

Question 1

What are the different portions of the pancreas

Answer 1

endocrine - secretion delivered out bottom of cell into capillaries which are under cell and carried out to somewhere else
exocrine - secretory portions with columnar epithelial cells

Question 2

What are acini cells

Answer 2

Clusters of columnar secretory cells that surround ducts (cuboidal)

Question 3

What do acinar cells produce a lot of

Answer 3

Extensive rough endoplasmic reticulum and zymogen granules

Question 4

What do the acinar cells produce

Answer 4

Pancreatic proteases
Pancreatic amylase
Pancreatic lipase

Question 5

What do duct epithelial cells produce

Answer 5

Secrete bicarbonate ions to control pH in direct relation to the amount of HCl produced in the stomach

Water (all together is pancreatic juice)

Question 6

Why don’t acinar cells digest themselves

Answer 6

Secretions are packaged and inactive

Question 7

Where is bile synthesised and where is it secreted

Answer 7

Synthesised in the hepatocytes and secreted into the canaliculi

Question 8

What do canaliculi combine to form

Answer 8

Bile ductules then portal tracts and finally common hepatic duct