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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 matchings provided are correct, we will analyze each one step by step: 1. **Artificial active immunity: vaccination** - **Explanation**: Artificial active immunity is indeed achieved through vaccination. Vaccines stimulate the immune system to produce antibodies and memory cells against specific pathogens, providing long-term immunity. - **Conclusion**: This matching is **correct**. 2. **Natural passive immunity: Anti-tetanus serum (ATS)** - **Explanation**: Anti-tetanus serum provides artificial passive immunity, not natural passive immunity. Natural passive immunity occurs when antibodies are transferred from mother to child (e.g., through breast milk). Since ATS is administered and not naturally acquired, this matching is **incorrect**. - **Conclusion**: This matching is **incorrect**. 3. **First line of defense: physical barriers** - **Explanation**: The first line of defense in the immune system includes physical barriers such as skin, mucous membranes, and other external defenses that prevent pathogen entry. This definition aligns with the matching provided. - **Conclusion**: This matching is **correct**. 4. **Anamnestic responses: Quick and highly intensified response** - **Explanation**: Anamnestic responses refer to the rapid and robust immune response that occurs upon re-exposure to a previously encountered pathogen. This is due to the presence of memory cells that respond quickly. - **Conclusion**: This matching is **correct**. 5. **Graft rejection: Due to cell-mediated immunity (CMI)** - **Explanation**: Graft rejection occurs when the immune system identifies transplanted tissue as foreign and initiates a response mediated by T cells, which is a characteristic of cell-mediated immunity. - **Conclusion**: This matching is **correct**. Now, let's summarize the findings: - Correct matchings: 1 (Artificial active immunity: vaccination), 3 (First line of defense: physical barriers), 4 (Anamnestic responses: Quick and highly intensified response), 5 (Graft rejection: Due to cell-mediated immunity). - Incorrect matching: 2 (Natural passive immunity: Anti-tetanus serum). **Total Correct Matchings**: 4 ### Final Answer: **4 matchings are correct.**
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