Name _______________________________ Hour____
Study the chart below and fill in the missing information about the following hormones that are activated
during digestion.
Hormone
Triggered by
Released from
Actions
Gastrin
Vagus nerve; food in
stomach, esp.
undigested proteins
G-cells within Gastric
glands and also the
duodenum
Stimulates the stomach (prod. of acids and
enzymes and also increase motility)
Secretin
chyme entering
duodenum
duodenum
Stimulates pancreas to secrete buffers; slows
down digestion in stomach; increases
production of bile
Cholecystokinin
(CCK)
chyme entering the
duodenum containing
lipids and partially
digested proteins
duodenum
Stimulates pancreas to digestive enzymes;
slows down digestion in stomach; causes gall
bladder and liver to release contents; reduces
feeling of hunger
Gastric inhibitory
peptide (GIP)
chyme entering the
duodenum containing
many lipids and/or
glucose
duodenum
Stimulates the release of insulin from
pancreas, inhibits stomach
Study the chart below and fill in the missing information about the following enzymes that are released
during digestion.
Enzyme
Released by
Optimal pH
Breaks down
Products
amylase
Salivary glands and
pancreas
6.7 – 7.5
complex carbs
disaccharides
trisaccharides
maltase, sucrase, lactase
Small intestine
7-8
maltose, sucrose,
lactose (disaccharides)
monosaccharides
pepsin
chief cells in stomach
1.5 – 2.0
proteins; polypeptides
short polypeptides
trypsin, chymotrypsin,
carboxypeptidase
pancreas
7-8
proteins; polypeptides
dipeptides, tripeptides
peptidases
small intestine
7-8
dipeptides, tripeptides
amino acids
pancreas
7-8
triglycerides (fats &
oils)
fatty acids and
monoglyderides
pancreas
7-8
nucleic acids
nitrogenous bases and
simple sugars
CARBOHYDRASES
PROTEASES
LIPASES
pancreatic lipase
NUCLEASES
nucleases