📖 what
What are natural killer cells?
Quick Answer
Natural killer cells are immune cells that can destroy infected or cancerous cells without needing prior exposure. They are part of the body’s rapid first-response defense.
The Full Story
Natural killer cells, or NK cells, are a type of white blood cell in the innate immune system. They detect stressed, infected or abnormal cells and can trigger them to self-destruct. Unlike T cells, NK cells do not require prior antigen-specific training in the same way, which allows them to act quickly. They are important in controlling viral infections and helping limit early tumor growth.
Key Facts
1.NK cells are part of innate immunity
2.They can kill virus-infected and cancerous cells
3.They act quickly without prior sensitization
YouTube Angle
Suggested video title for this topic:
"The immune cells that attack dangerous cells on sight"
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