[Campbell Biology P.1023] According to the provided text, which of the following is a key com... | Practice Question

According to the provided text, which of the following is a key component of the body's innate immune system?

  • A: Natural killer cells and interferons.
  • B: HIV-specific antibodies.
  • C: Components specific to a single, unique pathogen.
  • D: Histamine, which directly attacks and destroys bacteria.

Explanation

The 'Summary of Key Concepts' section under 'CONCEPT 43.1' states that 'Additional cellular defenses include natural killer cells' and 'Complement system proteins, interferons, and other antimicrobial peptides also act against pathogens.' Therefore, natural killer cells and interferons are key components of innate immunity.