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Innate, Acquired & Active Immunity: Immunity Video Lecture - NEET

FAQs on Innate, Acquired & Active Immunity: Immunity Video Lecture - NEET

1. What is innate immunity?
Ans. Innate immunity is the body's first line of defense against pathogens. It is a natural, non-specific immune response that is present from birth. It includes physical barriers like the skin and mucous membranes, as well as cellular and molecular components such as phagocytes and antimicrobial proteins.
2. What is acquired immunity?
Ans. Acquired immunity, also known as adaptive immunity, is the immune response that develops after exposure to a specific pathogen. It is characterized by the production of antibodies and memory cells that provide long-term protection against future infections by the same pathogen.
3. How does active immunity differ from passive immunity?
Ans. Active immunity is the result of the body's own immune response, either through natural infection or vaccination. It involves the production of antibodies and memory cells. In contrast, passive immunity is temporary and acquired from an external source, such as receiving antibodies from another person or animal. It does not involve the body's own immune response.
4. Can innate immunity be strengthened or improved?
Ans. While innate immunity is not specific to any particular pathogen, it can be enhanced by maintaining a healthy lifestyle. Regular exercise, adequate sleep, a balanced diet, and proper hygiene practices can all contribute to a stronger innate immune system.
5. How does acquired immunity provide long-term protection?
Ans. Acquired immunity relies on memory cells that are generated during the immune response to a specific pathogen. These memory cells "remember" the pathogen and can mount a rapid and effective immune response if the same pathogen is encountered again in the future. This allows for long-term protection against re-infection.
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