General principles of gastrointestinal functions –motility, secretion and absorbtion. (Variable course, VC)

Theme 5.

General principles of gastrointestinal functions –motility, secretion and absorbtion. (Variable course, VC)

The goal of the lesson to study of gastrointestinal functions and thear regulation

Questions for discussion.

1.Digestion in the stomach, secretion, movement. Regulation of these processes.

2. Digestion in the small intestine and suction Its secretion, movement and suction. Regulation of secretion, movement.

3. The role of the liver in digestion. Composition of bile, regulation of secretion and removing. Pancreatic function. Its external secretion, regulation of secretion.

4. Suction function in various parts of the digestive tract.

Books recommended

1. Ganong W.F. Review of Medical Physiology. 20thed; McGraw-Hill Companies, Inc., 2001. – P.

2. Guyton A.C., Hall J.E. Textbook of Medical Physiology, 12thed; WB Saunders, 2008.

Virtual work 1. Substrate specificity of salivary amylase.

The salivary amylase is glycolytic enzyme whose characteristic substrates are represented by starch and glycogen. Saliva amylase breaks down starch to maltose (disaccharides).

Table 1.

monosaccharides

Starch salivary amylase

Sucrose salivary amylase

Cellulose salivary amylase

Conclusion. Answer the question: does saliva amylase act on disaccharides?

Virtual work 2.The influence of pH on the action of pepsine

Table 2.

Digestion

Ovalbumine Pepsine + HCl

Ovalbumine Pepsine + H2O

Ovalbumine H2O + HCl

Conclusion.What pH activates pepsin?

Functional system of maintaining the amount of nutrients in the body

Cortex behavior

ANS digestive empty concentration gluc.

tract stomach blood

LRC AR Depot

substances mechanoreceptors chemorecept.

Endocrine Gl. (liver, fatty tissue)

AR - automatic regulation. LRC – limbic-reticular complex.

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