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Explain Skin Secretions - External Defence Mechanism
The oil and sweat secreted by sebaceous and soporiferous glands contains fatty and lactic acids, which makes the surface of the skin acidic (pH 3-5). These prevent the organisms from infecting the skin. Some friendly bacteria, which reside on the skin checks growth of microbes to a certain extent. Lysosomal enzymes of the skin have a bactericidal effect. Thus the skin becomes a self-disinfecting organ.
Objectives After studying this unit you should be able to: 1. state the principal hazards of biology lab work, 2. describe the ways to minimize these dangers, 3. ex
how many eggs does human have?
As glaciers erode the surface over which they move, sets of parallel linear grooves are sometime worn into the rock surface. These grooves are known as: Striations
Define White Blood Corpuscles as Internal Defence Mechanism The white blood cells are probably the most important part of our immune system. You may recall reading about the wh
What is a chemical formula? A chemical formula is a way of representing molecules without drawing them. The chemical formula shows the ratio of atoms that form any given molecu
assignment for natural rubber
What is International Enzyme International Enzyme :- the amount of enzyme that catalyses the transformation of 1 mole of substrate into product in 1 minute.
Procedure : Unscrew the plug top with the help of a screw driver. Remove one of the screws on the wire clamp and loosen the other. Cut away about 50 mm of the outer sheath of the
Which are clouds formed at the highest altitude: cirrocumulus
Define Carbohydrates Sugar, like a candle, can burn but burning requires oxygen. We eat to do work. To do their work, cells need an important group of food known as 'carbohydr
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