Which of the following cell types is not considered a professional antigen-presenting cell?Group of answer choicesmacrophageneutrophilB celldendritic cell

The cell type that is not considered a professional antigen-presenting cell among the given options is the neutrophil.

Here's why:

1. Macrophages: These are a type of white blood cell that engulf and digest cellular debris, foreign substances, microbes, cancer cells, and anything else that does not have the types of proteins specific to healthy body cells on its surface in a process called phagocytosis. They are considered professional antigen-presenting cells because they can present these foreign substances to T cells, activating an immune response.

2. B cells: These are a type of white blood cell that are vital to the immune system. They produce and secrete antibodies, which will bind to pathogens to neutralize them or mark them for destruction by other immune cells. B cells also present antigens to T cells to stimulate an immune response, making them professional antigen-presenting cells.

3. Dendritic cells: These are antigen-presenting cells that process antigen material and present it on the cell surface to the T cells of the immune system. They act as messengers between the innate and the adaptive immune systems, making them professional antigen-presenting cells.

4. Neutrophils: These are the most abundant type of granulocytes and the most abundant type of white blood cells in most mammals. They form an essential part of the innate immune system. However, they are not typically classified as professional antigen-presenting cells because they do not effectively present antigens to T cells. Their primary role is to ingest bacteria and other particles.