Final answer:
The correct pairing for types of white blood cells is B) granulocyte; lymphocyte. Granulocytes are characterized by granules and a lobed nucleus, while agranulocytes consist of lymphocytes and monocytes.
Step-by-step explanation:
White blood cells, or leukocytes, play a crucial role in the immune system, defending the body against infections and foreign invaders. They are broadly categorized into two types based on the presence or absence of granules in their cytoplasm: granulocytes and agranulocytes.
Granulocytes, characterized by granules in their cytoplasm, include neutrophils, eosinophils, and basophils. Neutrophils are the most abundant and are involved in phagocytosis, targeting bacteria and fungi. Eosinophils are essential for combating parasitic infections and are also implicated in allergic reactions. Basophils release histamine, playing a role in inflammation and allergic responses.
On the other hand, agranulocytes lack visible granules and include lymphocytes and monocytes. Lymphocytes are a vital part of the adaptive immune system, responsible for specific immune responses, including antibody production. Monocytes, when they migrate into tissues, differentiate into macrophages, contributing to phagocytosis and immune regulation.
Therefore, the correct pairing is B) granulocyte; lymphocyte, as lymphocytes are a type of agranulocyte and play a central role in adaptive immunity, distinct from the granulocytes which have granules in their cytoplasm.