The mechanism by which antigen-reactive cells respond to foreign antigens while ignoring self-antigens is called clonal
A) selection.
B) deletion.
C) anergy.
D) expansion.

Question

Quizplus · Accepted Answer

Clonal selection is the process by which only antigen-reactive cells are selected to proliferate and respond to foreign antigens. This mechanism ensures that self-antigens are ignored, as self-reactive cells are deleted or rendered anergic (unresponsive). Expansion refers to the proliferation of selected antigen-reactive cells after clonal selection. Therefore, B and C are not the best choices.

The Mechanism by Which Antigen-Reactive Cells Respond to Foreign Antigens