Immune System
Cell-mediated immunity is primarily mediated by which cells?
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About This Question
- Subject
- biology
- Chapter
- human physiology
- Topic
- immune system
- Difficulty
- Hard
- Year
- 2025
Solution
Correct Answer:
Helper and cytotoxic T cells
- Specific Immunity: Divided into Humoral and Cell-mediated components.
- Humoral Immunity: Carried out by B-lymphocytes which differentiate into plasma cells to secrete antibodies.
- Cell-mediated Immunity (CMI): Orchestrated by T-lymphocytes.
- Cytotoxic T cells (TC): Directly attack and destroy virus-infected or cancerous cells.
- Helper T cells (TH): Release chemicals to activate and coordinate other immune cells.
- Conclusion: T-cells do not produce antibodies but act directly or through cytokines.
This hard difficulty biology question is from the chapter human physiology, covering the topic of immune system. It appeared in the 2025 exam.
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