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Small Intestine - Anatomy & Physiology (view source)
Revision as of 10:31, 24 July 2008
, 10:31, 24 July 2008→Protein Digestion and Absorption
*The final products of protein digestion are amino acids and some di-,tri- and oligo-peptidases.
*The final products of protein digestion are amino acids and some di-,tri- and oligo-peptidases.
*Amino acids are absorbed by four carrier proteins; each transports a different type of amino acid.
*Amino acids are absorbed by four carrier proteins; each transports a different type of amino acid.
**Neutral amino acids e.g. ala, val, leu.
**Neutral amino acids e.g. alanine, valine, leucine.
**Dibasic amino acids e.g. lys, arg, orn.
**Dibasic amino acids e.g. lysine, arginine.
**Acidic amino acids e.g. glu, asp.
**Acidic amino acids e.g. glutamine, aspartic acid.
**Small amino acids inc. pro, hydroxyproline and gly.
**Small amino acids inc. proline, hydroxyproline and glycine.
***Amino acids within the same group compete with each other for the transport molecule.
***Amino acids within the same group compete with each other for the transport molecule.
***Amino acids are transported with sodium through a symport (like glucose), where amino acids travel up their concentration gradient and sodium travels down its concentration gradient.
***Amino acids are transported with sodium through a symport (like glucose), where amino acids travel up their concentration gradient and sodium travels down its concentration gradient.