INSIGHT UPSC QUIZ

Science & Technology General Science
Q.

In the context of ‘immunity’ in human body, which of the following statements is/are correct? 

1. Skin on our body is an example of innate immunity.

2. Acquired immunity is characterised by memory. 

3. Injecting the microbes deliberately during immunisation induce passive immunity. 

Select the correct answer using the code given below.

Explanation:

ANSWER: (B) 

  • Innate immunity is non-specific type of defense, that is present at the time of birth. This is accomplished by providing different types of barriers to the entry of the foreign agents into our body. Skin on our body is the main barrier which prevents entry of the micro-organisms. (Thus, Statement 1 is correct)
  • Acquired immunity, on the other hand is pathogen specific. It is characterised by memory. (Thus, Statement 2 is correct)
  • Injecting the microbes deliberately during immunisation or infectious organisms gaining access into body during natural infection induce active immunity. (Thus, Statement 3 is not correct)
  • When ready-made antibodies are directly given to protect the body against foreign agents, it is called passive immunity. 

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