A certain cell type has existed in the blood and tissue of its vertebrate host's immune system for over 20 years.One day,it recognizes a newly arrived antigen and binds to it,subsequently triggering a secondary immune response in the body.Which of the following cell types most accurately describes this cell?
A)B cell
B)T cell
C)memory cell
D)macrophage

Question

Quizplus · Accepted Answer

The cell described in the scenario is a memory cell, as it has existed in the immune system for over 20 years and is able to recognize and respond to a previously encountered antigen. B cells and T cells are types of lymphocytes involved in the immune response, but memory cells are a subtype that develop from B and T cells following an initial immune response. Macrophages are phagocytic cells involved in immune defense, but they do not become memory cells.

A Certain Cell Type Has Existed in the Blood and Tissue