Question

1. Match the white blood cells to their job in the immune system:

-A.B.C.D.E. Neutrophil                                                 -A.B.C.D.E. Lymphocytes                                                 -A.B.C.D.E. Monocytes                                                 -A.B.C.D.E. Eosinophils                                                 -A.B.C.D.E. Basophils

A. Non-granulated cells that make antibodies B. Activated during parasitic infections C. Multi-nucleated cells that destroy bacteria D. Releases histamine in response to cell damage E. Macrophages that breakdown wastes in the body

Answer 1

All the given cells are different types of WBC (White blood cells ) .WBC are the blood cells which are mainly concerned with the immunity of the body.

Neutrophil :Multi nucleated cell that destroys bacteria .

Lymphocytes : non granulated cells that makes antibodies.

Monocytes : macrophages that breakdown wastes in the body.

Eosinophils: Activated during parasitic infections.

Basophil : Release histamine ,in responses to cell damage.

WBC are divided into Granulocytes and agranulocytes based on the presence and absence of granules inside the cell.

Granulocytes are : Neutrophils,basophils and eosinophils

Non granulocytes are : monocyte and lymphocytes.

Mnemonic:(It's easy to remember as those words ending with "cytes" are just cells as such and do not have granules )

WBC are also classified as mononuclear and polymorphonuclear,based on the number of nuclei present .

As said above,monocyte and lymphocytes are mononuclear and neutrophils, basophils and eosinophilsare polymorphonuclear.

Functions of WBC

Neutrophil - phagocytic(destroys bacteria)
Eosinophil - phagocytic and damage to
larval stages of parasite.(This is the reason for many eosinophilic reactions in the body during an infection with parasitic larva. )
Basophil - storage of histamine,
involved in immediate hypersensitivity
reaction(type 1 hypersensitivity)
Monocyte - phagocytic,and also involved in cellular and
humoral immunity

Lymphocytes-are of 2 types B lymphocytes and T lymphocytes.

B cells are concerned with humoral immunity (immunity in the blood ) and T cells are concerned with cellular immunity