Question

White blood cells (leucocytes) that are non-specific killers of microbes are ______.

Options

• phagocytes

• B-cells

• killer T-cells

• helper T-cells

Answer 1

White blood cells (leucocytes) that are non-specific killers of microbes are phagocytes.

Explanation:

Phagocytes, such as neutrophils and macrophages, are white blood cells that act as non-specific killers of microbes by engulfing and destroying them through a process called phagocytosis. They provide innate immunity and are the first line of defense against infection. B-cells and T-cells are part of the specific immune response, with B-cells producing antibodies and killer T-cells targeting specific infected cells.