Multiple choice

Why are macrophages important?

  1. They are the first cells to recognize microscopic attackers

  2. They release chemical signals, called cytokines

  3. Both of these

  4. Neither of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Macrophages are crucial components of the innate immune system. They act as sentinel cells that are among the first to detect and engulf invading pathogens, and they also release cytokines to recruit and activate other immune cells to the site of infection.

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