Question

Which innate immune system component uses MHC class I molecules directly in its defense strategy?

a) Neutrophils
b) Macrophages
c) Natural killer cells
d) Mast cells

Answer 1

Natural killer cells use MHC class I molecules directly in their defense strategy.

Step-by-step explanation:

The innate immune system component that uses MHC class I molecules directly in its defense strategy is Natural killer cells. MHC class I molecules display fragments of proteins called antigens that are derived from within the cell. When a natural killer cell encounters a cell displaying abnormal or foreign antigens, it recognizes these antigens through their interaction with MHC class I molecules on the surface of the target cell and can initiate a response to destroy the target cell.