Examples of lymphocyte in the following topics:
-
- Approximately 0.1 percent of all cells in the blood are leukocytes, which include monocytes (the precursor of macrophages) and lymphocytes.
- On maturation, T and B lymphocytes circulate to various destinations.
- Antigen-presenting cells (APCs) in the lymph nodes capture and process antigens, informing nearby lymphocytes about potential pathogens.
- The spleen is also the site where APCs that have trapped foreign particles in the blood can communicate with lymphocytes.
- Lymph nodes are filled with lymphocytes that purge infecting cells.
-
- Lymphocytes are leukocytes (white blood cells) that are histologically identifiable by their large, darkly-staining nuclei; they are small cells with very little cytoplasm .
- After a pathogen enters the body, infected cells are identified and destroyed by natural killer (NK) cells, which are a type of lymphocyte that can kill cells infected with viruses or tumor cells (abnormal cells that uncontrollably divide and invade other tissue).
- While NK cells are part of the innate immune response, they are best understood relative to their counterparts in the adaptive immune response,T cells, which are also classified as lymphocytes.
- T cells are lymphocytes that mature in the thymus gland and identify intracellular infections, especially from viruses, by the altered expression of major histocompatibility class (MHC) I molecules on the surface of infected cells.
- Lymphocytes, such as NK cells, are characterized by their large nuclei that actively absorb Wright stain and, therefore, appear dark colored under a microscope.
-
- Unlike B cells, T lymphocytes (T cells) are unable to recognize pathogens without assistance.
- There are two main types of T cells: helper T lymphocytes (TH) and the cytotoxic T lymphocytes (TC).
- The TH lymphocytes function indirectly to tell other immune cells about potential pathogens, while cytotoxic T cells (TC) are the key component of the cell-mediated part of the adaptive immune system which attacks and destroys infected cells.
- TC cells also support NK lymphocytes to destroy early cancers.
- Lymphocytes of the adaptive immune response must interact with antigen-embedded MHC class II molecules to mature into functional immune cells.
-
- The second main group is the agranulocytes, which lack granules in their cytoplasm, and include the monocytes and lymphocytes ( b).
- Lymphocytes are the primary cells of the immune system.
- (b) Agranulocytes include lymphocytes and monocytes.
- Lymphocytes, including B and T cells, are responsible for adaptive immune response.
-
- For instance, radiation exposure can destroy populations of lymphocytes, elevating an individual's susceptibility to infections and cancer.
- Dozens of genetic disorders result in immunodeficiencies, including Severe Combined Immunodeficiency (SCID), bare lymphocyte syndrome, and MHC II deficiencies.
- Image of HIV: scanning electron micrograph of HIV-1 budding (in green, color added) from cultured lymphocyte
-
- Lymphocytes, which are white blood cells, are formed with other blood cells in the red bone marrow found in many flat bones, such as the shoulder or pelvic bones.
- The two types of lymphocytes of the adaptive immune response are B and T cells .
- Whether an immature lymphocyte becomes a B cell or T cell depends on where in the body it matures.
- This scanning electron micrograph shows a T lymphocyte.
-
- The primary mechanism for developing immune tolerance to self-antigens occurs during the selection for weakly, self-binding cells during T and B lymphocyte maturation.
- Any T or B lymphocytes that recognize harmless foreign or "self" antigens are deleted before they can fully mature into immunocompetent cells.
- Immune tolerance is brought about by specialized APCs in the liver, lymph nodes, small intestine, and lung that present harmless antigens to a diverse population of regulatory T (Treg) cells: specialized lymphocytes that suppress local inflammation and inhibit the secretion of stimulatory immune factors.
-
- White blood cells (including neutrophils, monocytes, lymphocytes, eosinophils, and basophils) are involved in the immune response.
-
- A memory cell is an antigen-specific B or T lymphocyte that does not differentiate into an effector cell during the primary immune response, but that can immediately become an effector cell on re-exposure to the same pathogen.
-
- Macrophages, lymphocytes, and, occasionally, leukocytes can be found in some of the tissues, while others may have specialized cells.