Users' questions

What types of cells are antigen-presenting cells?

What types of cells are antigen-presenting cells?

Antigen-presenting cells (APCs) are a heterogeneous group of immune cells that mediate the cellular immune response by processing and presenting antigens for recognition by certain lymphocytes such as T cells. Classical APCs include dendritic cells, macrophages, Langerhans cells and B cells.

What are the two major antigen-presenting cells?

The main types of professional antigen-presenting cells are dendritic cells, macrophages and B cells.

Which cell type is the most important antigen presenting cell APC )?

Dendritic cells
There are three main types of professional antigen-presenting cell: Dendritic cells (DCs), which have the broadest range of antigen presentation, and are probably the most important APC.

Which of the following is an antigen presenting cell?

Dendritic cells, macrophages, and B cells are the principal antigen-presenting cells for T cells, whereas follicular dendritic cells are the main antigen-presenting cells for B cells.

What is antigen processing and presentation?

Antigen processing and presentation are processes that occur within a cell that result in fragmentation (proteolysis) of proteins, association of the fragments with MHC molecules, and expression of the peptide-MHC molecules at the cell surface where they can be recognized by the T cell receptor on a T cell.

What are helper T cells?

helper T cell. n. any of a group of T cells that activate the immune system either by enhancing the production of antibody and other T cells or by mobilizing macrophages to engulf invading particles.

What is the structure of B cells?

The general structure of the B-cell receptor includes a membrane-bound immunoglobulin molecule and a signal transduction region. Disulfide bridges connect the immunoglobulin isotype and the signal transduction region. The B-cell receptor is composed of two parts: A membrane-bound immunoglobulin molecule of one isotype ( IgD , IgM , IgA , IgG , or IgE).