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How can an organism that once underwent contact with an antigen be immunized against future infections by the same agent?
This phenomenon is known as immune memory. When an antigen makes contact for the first time with cells of the humoral immune system, B lymphocytes that are producers of exact immunoglobulins against that antigen multiply and in days synthesize their antibodies. This is known as primary response. Some of these exact B lymphocytes remain in the circulation for a long time, sometimes during the whole life of the individual, and they become the memory cells of the immune system. When the body is exposed in the future to the similar antigen the production of antibodies will be faster and more intense as the immune system is already prepared to react against that antigen. This is known as the secondary response.
These are safe and free of systemic side effects. However, gastrointestinal side effects are common, and compliance is poor. The average LDL decreases by approximately 15 per cent
Composition of blood: Take few ml. of fresh blood in a test tube and before collecting the blood add a few drops of sodium oxalate or sodium citrate solution to prevent clot
Define about the Metabolism of Copper? In food, most copper is present as Cu 2+ and some as Cu 1+ . This copper is bound to organic compounds especially protein. Gastric HCI p
differenciate between plasma and serum
Which of the following most accurately explains the meaning of a repression lag? A. A repression lag refers to the time that it takes for the last full-length mRNA transcript t
Exstrophy of the Bladder This is the most common major congenital defect of lower urinary and genital tract. This is found more frequently in males than in females. Exstr
Explain about the supply curve or supply schedule. The supply curve or schedule shows the total quantity of a good or a service supplied within aggregate, by whole sellers or f
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Female Gametophyte The development of a female gametophyte is initiated with the enlargement of one of the megaspores (usually the one close to the chalaza in a linear tetrad)
Q. How different is the simple squamous epithelium from the stratified squamous epithelium? Where can these epithelia are found in the human body? The simple squamous epitheliu
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