First slide

Immunity

Question

Mark the incorrect feature of NK cells.

Easy

A

Provide second line of defense.
B

Secrete immunoglobulins.
C

Involved in innate immunity
D

Kill tumor and virus infected cells.

Solution

NK cells do not secrete immunoglobulins.
Natural killer cells are cellular barriers which are referred to as second line of defense. NK cell releases cytotoxic granules containing perforin and granzymes, which leads to lysis of the target cell (tumor cells or virus infected cells).

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