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What cells are primarily responsible for the immune response?

  1. Red blood cells

  2. White blood cells

  3. Platelets

  4. Neurons

The correct answer is: White blood cells

White blood cells, or leukocytes, play a crucial role in the body's immune response. These cells are essential for defending the body against infections and foreign substances. They are part of the immune system and come in various types, each with specific functions. For instance, lymphocytes (such as B cells and T cells) are involved in recognizing and responding to pathogens, while phagocytes (like macrophages and neutrophils) are responsible for engulfing and destroying these invaders. In contrast, red blood cells primarily carry oxygen throughout the body, platelets are involved in blood clotting, and neurons are responsible for transmitting nerve signals. While all these cell types have their critical functions within the body, it is the white blood cells that are directly involved in initiating and regulating the immune response, making them the primary agents against infections and diseases.