Multiple choice

Which of the following is not part of the innate immune system?

  1. Macrophages

  2. Natural Killer Cells

  3. Neutrophils

  4. All are part of the innate immune system
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Macrophages, Natural Killer (NK) cells, and neutrophils are all cellular components of the innate immune system, providing rapid, non-specific defense against pathogens. Since all of the listed options are indeed part of the innate immune system, the correct choice is that all are part of it.

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