Cells that fight infection, also called white blood cells, are known as which?

Cells that fight infection, also called white blood cells, are known as which?

• A. Leukocytes
• B. Platelets
• C. Erythrocytes
• D. Plasma Proteins

Answer: (A)

White blood cells, or leukocytes, are the immune system’s frontline defenders that identify, attack, and destroy invading pathogens such as bacteria, viruses, and fungi. This makes leukocytes the exact term for “cells that fight infection.” They originate in the bone marrow and circulate in the blood and lymphatic system. Other options aren’t cells that fight infection: platelets are small fragments that help with clotting, erythrocytes (red blood cells) transport oxygen, and plasma proteins are dissolved components of blood with various roles but are not cells.

White blood cells, or leukocytes, are the immune system’s frontline defenders that identify, attack, and destroy invading pathogens such as bacteria, viruses, and fungi. This makes leukocytes the exact term for “cells that fight infection.” They originate in the bone marrow and circulate in the blood and lymphatic system. Other options aren’t cells that fight infection: platelets are small fragments that help with clotting, erythrocytes (red blood cells) transport oxygen, and plasma proteins are dissolved components of blood with various roles but are not cells.