Chapter 21 C - BLG 102 - The Lymphatic System and Lymphoid Organs and Tissues

Flashcards covering key concepts related to the immune system, specifically focusing on T cells, their types, functions, and processes involved in T cell activation and antigen presentation.

T cells

Type of lymphocytes that provide defense against intracellular antigens such as viruses, bacteria, and cancerous cells.

CD4 cells

A type of T cell that usually becomes helper T cells, activating B cells, other T cells, and macrophages.

CD8 cells

A type of T cell that becomes cytotoxic T cells, capable of destroying cells harboring foreign antigens.

MHC Proteins

Major histocompatibility complex proteins that present processed fragments of antigens on cell surfaces for T cell recognition.

Antigen Presentation

The display of processed antigens on the surface of cells by MHC proteins, vital for activation of T cells.

Cytotoxic T cells (TC)

CD8 T cells that directly kill cells harboring foreign antigens.

Helper T cells (TH)

T cells that help activate B cells and other T cells and secrete cytokines to stimulate immune response.

Regulatory T cells

T cells that modulate the immune response, preventing overactivity.

Memory T cells

T cells that remain in the body after an infection to provide faster responses to future infections.

Co-stimulation

The requirement for T cells to bind to additional co-stimulatory signals for full activation.