What is the primary function of white blood cells?

What is the primary function of white blood cells?

• A. To transport oxygen
• B. To fight infection
• C. To produce hormones
• D. To clot blood

Answer: (B)

White blood cells play a crucial role in the immune system, which is essential for defending the body against infections and diseases. Their primary function is to detect and fight pathogens, such as bacteria, viruses, and other foreign invaders. There are various types of white blood cells, each with specialized functions, such as lymphocytes that are responsible for the adaptive immune response and phagocytes that engulf and digest harmful microorganisms. Transporting oxygen is the primary responsibility of red blood cells, while hormone production is mainly carried out by glands in the endocrine system. Blood clotting is facilitated by platelets and certain proteins in plasma, not by white blood cells. Thus, the best answer reflects the essential protective role white blood cells have in maintaining health by fighting infections.

White blood cells play a crucial role in the immune system, which is essential for defending the body against infections and diseases. Their primary function is to detect and fight pathogens, such as bacteria, viruses, and other foreign invaders. There are various types of white blood cells, each with specialized functions, such as lymphocytes that are responsible for the adaptive immune response and phagocytes that engulf and digest harmful microorganisms.

Transporting oxygen is the primary responsibility of red blood cells, while hormone production is mainly carried out by glands in the endocrine system. Blood clotting is facilitated by platelets and certain proteins in plasma, not by white blood cells. Thus, the best answer reflects the essential protective role white blood cells have in maintaining health by fighting infections.