how to overcome barriers

These block the entry of organisms into the body. The skin and mucous membranes of the body possess certain mechanical factors and chemical factors that are involved in combating the initial attempt of a microbe to cause a disease. Mucous secreted by the membranes being slightly viscous, entra..

Energy Barrier - In this theory, the rate constant is related to three factors Z, f and p by the equation k = Zfp b (19) where Z is the collision frequency f is the fraction of collisions having energy greater than the threshold energy and p is the fraction of the collisions that occurs w..

The skin and mucuous membranes secrete certain chemical which dispose of the pathoge..

Phagocytosis is an important mechanism of innate immunity. Whenever there is an infection in the body, the total count of Leucocytes increase..

In this theory, the rate constant is related to three factors Z, f and p by the equation k = Zfp..

In this theory, the rate constant is related to three factors Z, f and p by the equation k = Zfp b (19) where Z is the collision frequency f is the fraction of collisions having energy greater than the threshold energy and p is the fraction of the collisions that occurs with the reactant molecules ..

The metal surface is not allowed to come in contact with moisture, O 2 and CO 2 . i) Coating the metal surface with paint. ii) Applying oil or grease. iii) Electroplating with non-corroding metals like Ni, Cr, Al, Sn, Zn. iv) Coating with alkaline phosphate (anti rust) solutio..

From Arrhenius equation, it is seen that the rate constant k of a reaction increases with temperature and therefore, the rate of reaction also increases. Why does k depend on temperature? This can be explained, to a certain extent, by collision theor..

The external defence comprises physical and chemical barriers to the entry of pathogens into the bo..

In some flowers, there are some physical barriers between anther and stigma to prevent self-pollination. Example: Calotrop..