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Human Health and Disease — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYHuman Health and Disease1 Mark
MCQ
HIV causes reduction of:
  • A
    T-helper cells only
  • B
    All T-cells
  • C
    B-cells only
  • D
    Both B and T-cells
✓

Answer

  1. T-helper cells only

Explanation:

The T helper cells are a type of T-cells that play an important role in the immune system, particularly in the adaptive immune system. They help the activity of other immune cells by releasing T cell cytokines.

When the HIV infects the man it enters into the T-helper cells for replication and they utilize metabolic mechanism from T- helper cells. By the viral replication, T-helper cells get damaged and their number is gradually reduced.

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