Question

Macrophagocytosis: What type of naive T cell is activated?

a) CD4+
b) CD8+
c) Memory T cell
d) B cell

Answer 1

In macrophagocytosis, the naive T cells that are activated are CD4+ T cells. These helper T cells, once activated, can stimulate cytotoxic T cells to destroy infected cells. So, the correct answer is option a.

Step-by-step explanation:

Macrophagocytosis refers to the process by which macrophages engulf and digest pathogens. In the context of the activation of naive T cells, it is the CD4+ naive T cells that are activated. These CD4+ T cells are also known as helper T cells.

After engagement with MHC II molecules on antigen-presenting cells (APCs), the naive CD4+ T cells become activated. Once activated, they can stimulate other cells of the immune system, including CD8+ T cells, which differentiate into cytotoxic T cells that can kill infected cells. Therefore, the correct answer to the question is a) CD4+.

So, the correct answer is option a.