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Read the following matching carefully : ...

Read the following matching carefully :
(i) Artificial active immunity : vaccination
(ii) Natural passive immunity : Anti - tetanus serum (ATS)
(iii) First line of defense : physical barriers
(iv ) Anamnestic responses : Quick and highly intensified response
(V) Graft rejection : Due to cell - mediated immunity (CMI)
How many from the above matching's are correct ?

A

Five

B

Four

C

Three

D

Two

Text Solution

AI Generated Solution

The correct Answer is:
To determine how many of the given matchings are correct, let's analyze each statement one by one: 1. **Artificial active immunity: vaccination** - Vaccination involves introducing a weakened or dead pathogen into the body, prompting the immune system to produce antibodies. This is indeed a form of artificial active immunity. - **Conclusion**: Correct. 2. **Natural passive immunity: Anti-tetanus serum (ATS)** - Anti-tetanus serum contains ready-made antibodies introduced into the body to provide immediate protection against tetanus. However, this is not a natural process; it is artificially administered. Natural passive immunity occurs when antibodies are transferred from mother to child, for example, through breast milk. - **Conclusion**: Incorrect. 3. **First line of defense: physical barriers** - Physical barriers, such as skin and mucous membranes, serve as the first line of defense against pathogens. They prevent the entry of pathogens into the body. - **Conclusion**: Correct. 4. **Anamnestic responses: Quick and highly intensified response** - Anamnestic responses refer to the rapid and enhanced immune response upon re-exposure to a previously encountered antigen. This is due to the memory cells generated during the first exposure. - **Conclusion**: Correct. 5. **Graft rejection: Due to cell-mediated immunity (CMI)** - Graft rejection occurs when the immune system recognizes the transplanted tissue as foreign, primarily mediated by T-lymphocytes (cell-mediated immunity). - **Conclusion**: Correct. Now, let's summarize the correctness of each matching: - (i) Correct - (ii) Incorrect - (iii) Correct - (iv) Correct - (v) Correct **Total Correct Matchings**: 4 out of 5. ### Final Answer: **4 matchings are correct.**
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