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Select the correct statements regarding the characteristics of acquired immunity.

  1. Cell-mediated immunity is responsible for acquired immunity.
  2.  It produces a primary response of low intensity.
  3.  Active and passive immunity are types of acquired immunity.
  4.  Polymorphonuclear leucocytes and natural killer cells are involved in acquired immunity.
Option: 1

(I), (II) and (III)

 


Option: 2

(I), (III) and (IV)

 


Option: 3

(I) and (IV)

 


Option: 4

(I) and (III)


Answers (1)

best_answer

 

Acquired Immunity -

It is pathogen-specific.

- wherein

It is characterised by memory. This means that our body when it encounters a pathogen for the first time produces a response called primary response which is of low intensity. A subsequent encounter with the same pathogen elicits a highly intensified secondary or anamnestic response. This is ascribed to the fact that our body appears to have a memory of the first encounter.

 

 

 

Posted by

jitender.kumar

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