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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. Di-,tri- and oligo- peptides are absorbed by the γ glutamyl transfer cycle. γ Glutamyl transferase spans the enterocyte membrane and combines glutathione from the inside of the cell with a di-,tri- or oligo-peptide from the intestinal lumen forming a γ-glu-aa complex which is transported into the cell. The aas are then released and glutathione is recombined to enter the process again.

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. Di-,tri- and oligo- peptides are absorbed by the γ glutamyl transfer cycle. γ Glutamyl transferase spans the enterocyte membrane and combines glutathione from the inside of the cell with a di-,tri- or oligo-peptide from the intestinal lumen forming a γ-glu-aa complex which is transported into the cell. The aas are then released and glutathione is recombined to enter the process again.

==Regulation & Control==

==Regulación y Control==

The functions of the small (and large) intestine are regulated by three mechanisms: Endocrine hormones, paracrine hormones and neural transmitters. Unlike the [[Estómago Monogástrico - Anatomía & Fisiología|stomach]], control is mainly local, with superimposed co-ordination through the extrinsic ANS. All signals affect the small intestine via sensory neurones. Neurones interact with two plexuses in the intestinal wall. Neurones in the ''myenteric plexus'' produce changes in muscle ''contractility''. Neurones in the ''submucosal plexus'' produce changes in ''secretion'' and ''blood flow'' to the small intestine. Plexuses are connected via interneurones.

The functions of the small (and large) intestine are regulated by three mechanisms: Endocrine hormones, paracrine hormones and neural transmitters. Unlike the [[Estómago Monogástrico - Anatomía & Fisiología|stomach]], control is mainly local, with superimposed co-ordination through the extrinsic ANS. All signals affect the small intestine via sensory neurones. Neurones interact with two plexuses in the intestinal wall. Neurones in the ''myenteric plexus'' produce changes in muscle ''contractility''. Neurones in the ''submucosal plexus'' produce changes in ''secretion'' and ''blood flow'' to the small intestine. Plexuses are connected via interneurones.