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प्रश्न
It is generally observed that the children who had suffered from chicken–pox in their childhood may not contract the same disease in their adulthood. Explain giving reasons the basics of such immunity in an individual. Name this kind of immunity.
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उत्तर
People who have suffered from chickenpox in their childhood may not contract the disease again because of acquired immunity which is characterised by memory.
Acquired immunity is pathogen-specific. At the incidence of the first encounter with the microbe, the body produces a primary response of low intensity. On subsequent encounters with the same pathogen, a secondary response occurs which is of high intensity. This is attributed to the fact that our body has memory of the pathogen from the first encounter which had resulted in the production of antibodies against the pathogen.
संबंधित प्रश्न
A heavily bleeding and bruised road accident victim was brought to a nursing home. The doctor immediately gave him an injection to protect him against a deadly disease.
- Write what did the doctor inject into the patient’s body.
- How do you think this injection would protect the patient against the disease?
- Name the disease against which this injection was given and the kind of immunity it provides.
What are the uses of vaccine?
Write the full forms of: WHO
Write the full forms of: TAB
Describe the structure of an antibody.
STRUCTURE OF ANTIBODY
Give one significant difference between primary lymphoid organs and secondary lymphoid organs. Give one example of each.
Mention one application for the following:
Cytokinin-barrier
Mention one application of the following:
Colostrum
What do the abbreviations CMIS denote?
Immunity acquired after an infection is ______immunity.
Passive immunity is ______.
Define ‘Health’, as given by WHO.
All of the following statements are true with respect to immunity, EXCEPT
T-lymphocytes and B-lymphocytes are derived from ____________.
______ is secreted by killer T - cells.
All are forms of vaccines, EXCEPT ______.
On coming in contact with an antigen, a sensitized T-lymphocyte produces ____________.
Match column I with column II and choose the correct option.
| Column I | Column II | ||
| i. | Specificity | a. | Lymphocytes produced against each particular foreign molecule |
| ii. | Diversity | b. | Self-cells are not attacked by immune system of the own body |
| iii. | Memory | c. | Immune system works against multiple pathogens |
| iv. | Discrimination between self and non-self | d. | Stronger immune response on second encounter |
