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elixir [45]
3 years ago
9

What are the reasons for the several day delay in a primary response. Infection______. A. transport to secondary lymphoid tissue

B. antigen processing and presentation C. small initial # of lymphocytes specific for the antigen D. proliferation and differentiation.
Biology
1 answer:
Liula [17]3 years ago
7 0

Answer:

The correct answer is D. proliferation and differentiation.

Explanation:

Primary immune response occurs due to the first exposure of an antigen to the immune system. The primary immune response is generally delayed by many days because it takes time for B and T cells to become cloned and to proliferate and differentiate.

Then after several days of proliferation and differentiation of activated T and B cells, T cells become effector T cells and B cell becomes plasma cells which then eliminates the antigen. Memory B and T cells are also produced during this process which helps in generating a quick immune response during the second and subsequent exposure of that antigen.

So the correct answer is D. proliferation and differentiation.

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<h3>What are de dependent and independent variables?</h3>

  • Independent variables are those modified or changed by the researcher to study how this change affects another variable and hence the results.

This variable is not affected by any other one but influences or causes a reaction in other variables.

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The aim of the study was probably to analyze how temperature changed with depth.

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