The First Line of Cellular Defense Against Pathogens are The

Question

The first line of cellular defense against pathogens are the
A) T cells.
B) B cells.
C) NK cells.
D) phagocytes.
E) plasma cells.

Accepted Answer

Phagocytes, such as macrophages and neutrophils, are the first line of cellular defense against pathogens as they engulf and digest invading microbes. T cells, B cells, NK cells, and plasma cells are all involved in the adaptive immune response, which is a secondary line of defense that relies on memory cells to recognize and combat specific pathogens.