Digestion and Absorption Flashcards
1
Q
digestion in the mouth
A
- lipids - lingual lipase
- carbs - alpha amylase
- protein - none
2
Q
digestion in the stomach
A
- lipids - gastric lipase
- carbs - none
- protein - HCl denatures secondary and tertiary structures, pepsin is activated
3
Q
digestion in the intestine
A
- lipids - pancreatic lipase, colipase, cholesterol esterases, phospholipase A2
- carbs - pancreatic amylase, glucoamylase, sucrase-isomaltase, trehalase, lactase-glucosylceramidase
- protein - trypsin, chymotrypsin, elastase, carboxypeptidase, aminopeptidases
4
Q
characteristics of salivary alpha amylase
A
- endoglucosidase
- hydrolyzes alpha 1,4 bonds
- inactivated by low pH of the stomach
5
Q
characteristics of glycoamylase
A
- exoglucosidase
- specific for alpha 1,4
- starts at non-reducing end
6
Q
characteristics of sucrase-isomaltase complex
A
- most of the intestines ability to hydrolyze alpha 1,6
7
Q
characteristics of trehalase
A
- breaks down alpha 1,1 bonds
8
Q
characteristics of beta- glycosidase
A
- breaks beta 1,4 bonds between galactose and glucose
- lactose site
- active in young children
- susceptible to injury
9
Q
pepsinogen activation
A
- low pH (high H concentration)
10
Q
trypsinogen activation
A
- enteropeptidase
11
Q
chymotrypsinogen activation
A
- trypsin
12
Q
proelastase activation
A
- trypsin
13
Q
procarboxypeptidase activation
A
- trypsin
14
Q
function of colipase
A
- binds to fat and lipase activating pancreatic lipase
15
Q
ApoE
A
- recognized by liver cells
- digestion by lysosomes
