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प्रश्न
What does the term `memory' of the Immune system mean?
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उत्तर
When body encounters a pathogen for the first time produce a response called 1° response. 1° response is of low intensity. When body encounters the same pathogen subsequently the body elicits 2° response. 2° response is highly intensified. This is due to the fact that our body have memory of the first encounter.
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संबंधित प्रश्न
Name the primary lymphoid organs.
The following is well-known abbreviation, which have been used in this chapter. Expand to its full form:
MALT
MALT constitutes about ______ per cent of the lymphoid tissue in human body.
The letter Tin lymphocyte refers to:
Which of the following glands is large-sized at birth but reduces in size with ageing?
Which of the following is not lymphoid tissue?
Lymphoid tissue is found in ______
Bone marrow test is beneficial in case
Which of the following is not a lymphoid tissue?
Where are B-cells and T-cells formed? How do they differ from each other?
What would happen to the immune system if the thymus gland is removed from the body of a person?
Lymph nodes are secondary lymphoid organs. Explain the role of lymph nodes in our immune response.
Explain the role of Primary and Secondary Lymphoid organs with the help of suitable examples.
Name the secondary lymphoid organs.
Statement I: Bone marrow is the main lymphoid organ where all blood cells including lymphocytes are produced.
Statement II: Both bone marrow and thymus provide micro environments for the development and maturation of T-lymphocytes.
In the light of the above statements, choose the most appropriate answer from the options given below:
