CNA Practice Test
Body systemsQuestion 1686 of 1700

What does HIV attack?

  1. Red blood cells that carry oxygen
  2. The pancreas that makes insulin
  3. White blood cells that find germs
  4. The thyroid that makes hormones
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Correct answer: White blood cells that find germs

Damaged white blood cells can no longer fight infection.

Source: Nursing Assistant (Reuter), 11.9: Immune System

Practice body systems

Questions last reviewed: 18 October 2026