3 - GI Glands Flashcards
The pancreas is a mixed _______ and ______ gland
Exocrine and endocrine
Exocrine is made up of:
Serous secretory units
Compound acinar glands
Purpose of exocrine:
Released creatin and digestive enzyme
Endocrine releases:
Hormones
Endocrine contains:
Islets of langerhan - lots of capillaries
Islets of langerhan secrete
Insulin
Pancreas exocrine cells contain ________ enzymes like:
Digestive
Trypsinogen, chymotryspinogen, amylase, lipase
The endocrine portion of the gland makes up about 1.5% of the gland as the _________________
Islets of langerhans
Islets of langerhan are polygonal cells separated by ___________ and ________
A network of capillaries and reticular fibers
The islets of langerhan contains what 3 cells:
Beta-cells
Alpha-cells
Delta-cells
Most numerous cell in the center of the islet of langerhan - produces insulin - makes up 60-80% of the cells
B-cells
Largest cell found toward the outside of the islet of langerhan - produce glucagon and gastrin
Alpha-cells
Least numerous cells in the islets of langerhan - parents of Alpha and Beta Cells
Delta-Cells
The hepatic lobule has the _______ in the center
Central vein
The hepatic lobule of the liver has _______ in each “corner”
Triads
What is between the central vein and the triads?
Hepatocytes
What 3 components make a triad?
Branch of portal vein
Hepatic artery branch
Bile duct branch
What does the hepatic method of division tell us about the liver?
Where the blood comes from for a single central vein
The portal vein has what type of epithelium?
Simple squamous
Which is the largest opening in the triad?
Portal vein
What type of epithelium does the branch of the hepatic artery have?
Simple squamous (also thick smooth muscle)
What type of epithelium does the bile duct in the triad have?
Simple cuboidal
Hepatocytes have ________ on each side
Sinusoids
Kuppfer Cells (macrophages) may be seen in _________
Sinusoids