24.14 digestion and absorption Flashcards
1
Q
define digestion
A
breakdown of food molecules for absorption into circulation
2
Q
what are the 2 types of digestion?
A
mechanical and chemical
3
Q
define mechanical digestion
A
breaks lg food particles into small
4
Q
define chemical digestion
A
breaking of covalent bonds by digestive enzymes
5
Q
define chemical digestion
A
breaking of covalent bonds by digestive enzymes
6
Q
define absorption
A
molecules are moved out of digestive tract into circulation for distribution throughout the body
7
Q
how does pepsin act on proteins?
A
breaks proteins into smaller polypeptide chains
8
Q
proteolytic enzymes produce
A
small peptide chains: di, tri-peptides and amino acids
9
Q
what happens to amino acids after absorption?
A
amino acids are carried through the hepatic portal vein to the liver
