Pancreas Flashcards
endocrine part of pancreas
pancreatic islets
exocrine part of pancreas
groups of acini
three kinds of cells that make up endocrine portion of pancreas (pancreatic islets)
alpha
beta
delta
alpha cells produce
glucagon
beta cells produce
insulin
delta cells produce
somatostatin
ducts from the exocrine portion of the pancreas merge to converge into where
pancreatic duct
exocrine pancreatic excretions contain what
bicarbonate and digestive proenzymes
what causes exocrine secretions and happens in what phase of digestion
anticipation of food
cephalic phase
what increases pancreatic secretions and happens in what phase of digestion
neural and endocrine stimuli
cephalic, gastric and luminal phases
four enzymes vital to digestion, that come from the exocrine pancreas
lipase
amylase
protease
nuclease
lipase breaks down ____ into _____ acids
fat
fatty
amylase breaks down _____ into _____
starch
maltose
protease breaks down _____ into _____
protein
amino acids
nuclease breaks down _____ into ______
DNA
nucleotides
all of the protease enzymes are secreted in an inactive form called
proenzyme (or zymogen)
where are proenzymes released from
SI mucosa
where are proenzymes activated
lumen of the intestine
five proezymes
trypsinogen
chymotrypsinogen
proelastase
procarboxypeptidase A and B
what hormone starts the activation process of proenzyme
CCK
CCK stimulates _______ release from mucosa
enteropeptidase
enteropeptidase > converts ______ into ________
Trypsinogen into Trypsin
Trypsin activates/converts what
all other protease enzymes
