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Define the Lymphocytes
They are agranulocytes. The nucleus occupies approximately the entire cell. They vary in size from 6- 18 mm diameter; sometimes divide in small and large lymphocytes. Lymphocytes build up 30% to 40% of all leukocytes. Lymphocytes come in two categorizes: B cells (those that mature in bone marrow) and T-cells (those that mature in the thymus). Let us get to know them. B-cells, while stimulated, mature into plasma cells.
These are the cells which generate antibodies. A specific B cell is tuned to a particular germ, and when the germ is availabe in the body, the B-cell clones itself and generates millions of antibodies designed to eliminate the germ. T-cells, on the other hand, in fact bump up against cells and kill them. T-cells termed as Killer T-cells can detect cells in our body which are harboring viruses, and when it detects such type of a cell, it kills it. Two other types of T-cells, termed as Helper and Suppressor T-cells help sensitize killer T-cells and control the immune Response.
A model reaction water turbine Use a soda water bottle from which the bottom has been separate. Wind string around it near the bottom end and suspend it as shown in the diagram
Role of Antibody Mediated Immune System The AMlS defends the body against free viruses, bacteria with polysaccharide capsules and toxins that enter the body fluids (blood and l
Where friction is desirable and undesirable at the same time.
Explain the Structure and Functions of Liver The liver is enclosed in a thin capsule and is completely covered by a peritoneum. The liver is described as having four lobes. As
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Precautions : The following must always be observed while dealing with lasers. 1) Never look along a laser beam or expose any part of your skin to it. Beware of reflected laser
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Explain the acid/base balance of our blood changes This acid/base balance of our blood changes in response to many things. These include: Diet: the diets that are rich in
For highly volatile liquid wastes Highly volatile liquid waste could be disposed of by effective ventilation until the liquid completely evaporates. Example: Diethyl ether.
Explain Dyes for Measurement of Plasma Volume: A number of dyes, commonly known as 'vital dyes', have the ability to combine with proteins. When such a dye is injected into the
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