Flashcards in Glands of digestion Deck (42)
What organ lies inferior to liver - bulk of which is a body and contains a cystic duct that connects to a narrow neck
What is the function of gallbladder
store and concentrate bile (can hold ~70 mL)
What is the difference between hepatic bile and cystic bile
Hepatic = primary bile (from liver)
Cystic = concentrated bile (in gallbladder)
What hormone controls secretion of bile
CCK (and vagus n.)
What is the surface epithelium of mucosa in gallbladder
Clear cells (cholangiocytes) in the mucosa of the gallbladder have many what? What is the their function?
What do brush cells in the gallbladder do? Are there many of them?
few in number
True or false; the lamina propria of the gallbladder is loose and very vascular
True or false; a muscularis mucosa is absent in the gallbladder
What is very unique about the submucosa of the gallbladder
It is ABSENT!
True or false; the muscularis externa of gallbladder has a normal pattern
false - not normal patter - thin smooth muscle layer with disorganized muscle arrangement
Is the gallbladder mostly serosa or adventitia
serosa but some adventitia where it attaches to liver
True or false; the pancreas has an exocrine and endocrine function
What is the endocrine process of the pancreas
islets of langerhans producing hormones
What is the exocrine process of the pancreas
serous acini producing digestive enzymes
True or false; the largest portion of the pancreas is exocrine portion
The secretion of the exocrine portion of the pancreas (serous acini) is controlled by what?
CCK an ACH from parasymp. nerves
What controls secretion of water and bicarb from pancreatic ducts
secretin and ACH from parasymp nerves
The centroacinar cells (which are located next to acinar cells) along with cuboid cells in the intercalated pancreatic ducts release what into where?
Release alkaline fluid (bicarb) into duodenum to buffer stomach chyme
What is the function of the collagen rich ct. wrapping pancreatic duct?
Provide extra protection from digestive enzymes leaking
What is the largest gland in the body with exocrine and endocrine function?
True or false; on top of metabolism of lipids, carbs and proteins - production of blood protein - detoxifying - and hepatic bile production - the liver also stores vitamin A and B12
What is the shape of classic liver lobules?
Microvilliated cuboidal cells (in columns) possessing lateral bile canaliculi best describes what cell?
What is the most common cell type of liver
How does bile move from hepatocytes
towards bile duct branch through the portal triad
What is the arrangement of hepatocytes?
In rows between hepatic sinusoids like spokes of a wheel
What are Kupffer cells?
Resident macrophages (develop from monocytes)
What is the function of Kupffer cells?
Phagocytosis of debris (antigen presentation)