everyday science MCQ #4752

White blood cells act:

everyday science MCQ #4752

  1. Question 1

    Q1. White blood cells act:

    • A) As a source of energy
    • B) For blood clotting
    • C) As a defence against infection
    • D) As a medium for oxygen transport from lungs to tissues

    Answer: As a defence against infection

    Explanation: White blood cells (leukocytes) are the body's primary immune defense, recognizing and destroying pathogens such as bacteria, viruses, and foreign particles through various mechanisms.