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Q. How can an organism that once underwent contact with an antigen be immunized against future infections by the same agent?
This phenomenon is called 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 specific immunoglobulins against that antigen multiply and in days synthesize their antibodies this is called as primary response. Few of these specific B lymphocytes remain in the circulation for a long time, sometimes during the entire life of the individual, and they become the memory cells of the immune system when the body is exposed in the future to the same antigen the production of antibodies will be more intense and faster since the immune system is already prepared to react against that antigen this is called as the secondary response.
CRANIU M - Large, hollow, rounded part of the skull. It's cavity is cranial cavity in it brain is protected. Such animals in which cranium present grouped in craniata.
why and where endomitosis happen.........?
nervous system of vertebrates
Diastolic dysfunction is responsible for one third of cases of heart failure alone and rest two third of cases in combination with systolic dysfunction. Diastolic dysfunction c
Explain the Disadvantages of tissue punch - There is a loss of keratini-ed tissue and this can lead to a compromised soft tissue barrier in cases where there is deficiency of a
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Name a few foods which are best blanched? Yes, green beans, carrots, okra, turnip and cabbage should always be blanched. On the other hand, blanching is not needed for onions,
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Blunt Injury Closed penumothorax Tension pneumothorax Tracheobronchial injury Fracture ribs and flail chest Mediastinal injury
Features of Plant Hormones The following are the important features of the role of plant hormones in growth and development: The hormone may initiate one response
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