Dictionary > Memory T cell

Memory T cell

noun, plural: memory T cells
A long-lived T cell that bears receptors for an antigen during its encounter with a prior infection or vaccination
In mammals, the T lymphocytes (also called T cells) form in the bone marrow and attains maturity in the thymus. There are different types of T lymphocytes and one of them is memory T cell.
A memory T cell, compared with other T lymphocytes, lives relatively longer. It can recognize pathogens, such as bacteria and viruses, and cancer cells. The receptors on its cell surface enables an immune response against these foreign particles. The cell got its name memory from its ability to recognize the same foreign particle through its receptors. Recognizing the pathogen previously encountered during re-exposure, the memory T cells produce clones immediately and as such respond to the infection more strongly.
A memory T cell is different from a memory B cell. Apart from the lineage from where they were derived, the memory B cell produces large amounts of antibodies during re-exposure to the same antigen whereas the memory T cell does not. Both of them, though, are capable of proliferating to produce clones during re-exposure to a particular antigen.
See also:

You will also like...

An artist depiction of a Precambrian multicellular life form.
The Evolution of Cell Organelles

The nucleus containing the genetic material, DNA, and the mitochondria, well-identified as the "powerhouse of the cell",..

Cells in different stages of meiosis
Meiosis – The Genetics of Reproduction

Meiosis is a form of cell division that creates gametes. It is comprised of two divisions that in the end, the resulting..

Pink Lotus plant on a pond
Freshwater Lentic Communities & Animals

This tutorial looks at some of the communities in freshwater lentic habitats. For instance, symbiosis occurs in a commun..

Independent Assortment and Crossing Over
Independent Assortment and Crossing Over

This tutorial describes the independent assortment of chromosomes and crossing over as important events in meiosis. Read..

The process of photosynthesis
Photosynthesis – Photolysis and Carbon Fixation

Photosynthesis is the process that plants undertake to create organic materials from carbon dioxide and water, with the ..

Plant Auxins
Plant Auxins – Phototropism & Geotropism

Plants produce hormones to regulate their growth. Auxins, for instance, influence plant growth. Know the role of auxin i..