Histology of the Pancreas, Liver and Gallbladder Flashcards
Under the microscope, the exocrine pancreas can easily be mistaken for which organ?
Parotid gland
Exocrine pancreas: serous, mucous, mixed
Serous
Islets of Langerhans: exocrine or endocrine?
Endocrine
The pancreatic digestive enzyme are activated in the pancreatic duct. T/F
F
They are activated only after they reach the lumen of the small intestine.
Acinar cells of the pancreas secrete hormones. T/F
F
They secrete enzymes.
What stimulates the intercalated ducts of the pancreas to secrete HCO3?
Secretin
What stimulates the acinar cells of the pancreas to secrete proenzymes?
CCK
Which structure of the pancreas secretes fluid rich in Na and HCO3?
Intercalated ducts
Which structure of the pancreas secretes proenzymes?
Acinar cells
Which part of the pancreas are islets of Langerhans most numerous?
Tail
The principal cells of the islets of Langerhans
A (alpha) cells, B (beta) cells, D (delta) cells
70% of the total islet cells in the human pancreas
B (beta) cells
15 to 20% of the total islet cells in the human pancreas
A (alpha) cells
5 to 10% the total islet cells in the human pancreas
D (delta) cells
Cells that secrete insulin
B (beta) cells
Most numerous cells in the islets of Langerhans
B (beta) cells
Cells that secrete glucagon
A (alpha) cells
Cells that secrete somatostatin
D (delta) cells
What do B cells of the pancreas secrete?
Insulin
What do D cells of the pancreas secrete?
Somatostatin
What do A cells of the pancreas secrete?
Glucagon
The most abundant endocrine secretion
Insulin
