VPB 121: Veterinary Physiology - II (2+1)

DIGESTIVE ENZYMES IN THE INTESTINAL JUICE

• Enterokinase: activates trypsinogen to trypsin.
• Dipeptidase   : converts proteases to peptones and amino acids.
• Aminopeptidases : converts peptones to amino acids.
• Maltases : converts maltose to glucose
• Lactases : converts lactase to glucose and galactose
• Sucrase   : coverts sucrose to glucose and fructose
• Nuclease : converts nucleic acids to mononucleotides.
• Nucleotidase and nucleosidases: convert nucleic acids to purines, pyrimidine bases, phosphoric acid and petose sugars.
• Lipases : act on fat liberating fatty acids and glycerol.
• Amylases : act on starch resulting in dextrins and maltose.

Optimum pH in various compartments of the G.I tract

• Stomach contents: 4.60
• Duodenum : 7.30
• Jejunum : 7.47
• Ileum: 7.55
• Caecum: 7.09
• Colon: 7.09
• Rectum: 6.24