Physiological functions of the liver



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8. LIVER & G.Bladder55 (1)

Functions of BILE

  • Required for digestion and absorption of fats :
  • A) Emulsification of fat and formation of micelle.
  • B) Active pancreatic lipase helps in digestion
  • Absorption of fat soluble vitamins
  • Choleretic and cholegauge action
  • Endogenous synthesis of bile salts
  • Bacteriostatic action
  • Major route for loss of cholesterol from body
  • Lubricating function due to mucus
  • Alkaline helps in neutralizing acid chyme.

Enterohepatic circulation

  • About 94% of bile salts are reabsorbed into the blood from the small intestine( by diffusion in early part of intestine & by active transport from distal ileum). They then enter the portal blood and pass back to the liver. On reaching the liver, these bile salts are absorbed almost entirely back into the hepatic cells and are
  • re excreted into the bile.

In this way about 94% of all bile salts are re circulated into the bile, so that on the average these salts make the entire circuit some 17 times before being carried out in the feces. The small quantities of bile salts lost in to the feces are replaced by new amount formed continuously by liver cells. This recirculation of bile salts is called enterohepatic circulation. Necessary because of limited pool of bile salts

  • In this way about 94% of all bile salts are re circulated into the bile, so that on the average these salts make the entire circuit some 17 times before being carried out in the feces. The small quantities of bile salts lost in to the feces are replaced by new amount formed continuously by liver cells. This recirculation of bile salts is called enterohepatic circulation. Necessary because of limited pool of bile salts

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