© 2003 Science Press Internet Services FISIOLOGIA DIGESTIVA FISIOLOGÍA DIGESTIVA (BCM II) Dr. Michel Baró Aliste Clase 11: Digestión y absorción de nutrientes

© 2003 Science Press Internet Services Nutrients provided by animal and vegetable products

© 2003 Science Press Internet Services Digestive process is initiated by sensory signals

© 2003 Science Press Internet Services The effect of discussion, sight, and smell of food

© 2003 Science Press Internet Services Oral cavity has important functions in initial processing

© 2003 Science Press Internet Services The arrival of a swallowed food bolus in the stomach

© 2003 Science Press Internet Services The emptying of food from the stomach

© 2003 Science Press Internet Services Passage of acidic, hyperosmolar gastric chyme into duodenum

© 2003 Science Press Internet Services Cholecystokinin and secretin are of major importance

© 2003 Science Press Internet Services Macronutrient digestion and absorption proceed at rapid pace 95%

© 2003 Science Press Internet Services Large bowel: role in carbohydrate digestion and absorption

© 2003 Science Press Internet Services The primary bile acids, cholic and chenic acid Recirculación entero-hepática de las sales biliares: dos veces por cada comida.

© 2003 Science Press Internet Services Lipids have highest energy content of 3 macronutrients a-grasos esenciales: ac.linoleico ac.linolénico

© 2003 Science Press Internet Services The initial event in lipid digestion in the stomach Formación de gotas de emulsión pH 4-5,5

© 2003 Science Press Internet Services Lipid digestion proceeds at a rapid pace in duodenum

© 2003 Science Press Internet Services Bile acids are amphipaths

© 2003 Science Press Internet Services Transport of lipolytic products

© 2003 Science Press Internet Services The lipolytic products are resynthesized acetil-coA

© 2003 Science Press Internet Services End products of lipid absorption in the enterocytes

© 2003 Science Press Internet Services Carbohydrate is the major energy source in the diet +sucrosa +lactosa 400 g/día Endoglucosidasas

© 2003 Science Press Internet Services Products of starch digestion and two dietary disaccharides

© 2003 Science Press Internet Services Glucose, galactose, and fructose are not lipid soluble

© 2003 Science Press Internet Services Protein digestion begins in the stomach

© 2003 Science Press Internet Services Average daily protein intake is about g in adults

© 2003 Science Press Internet Services The proteolytic enzymes secreted by pancreatic acini

© 2003 Science Press Internet Services Oligopeptides and amino acids generated by intraluminal proteolysis

© 2003 Science Press Internet Services Proteolytic enzymes are secreted in vast excess by pancreas bás. arom. alif. bás. neut.

© 2003 Science Press Internet Services Dipeptides, tripeptides, and amino acids

© 2003 Science Press Internet Services Amino acid transport systems

© 2003 Science Press Internet Services Vitamin B12 is one of water-soluble vitamins

© 2003 Science Press Internet Services Folate is present in food, primarily in polyglutamate form ( exopeptidasa ) (hidrosolubles)

© 2003 Science Press Internet Services Daily intake of 3 major minerals in the diet

© 2003 Science Press Internet Services Trace elements are important constituents of diet

© 2003 Science Press Internet Services Fin