B Cells: Type of lymphocyte responsible for antibody-mediated immunity; mature in the bone marrow and circulate in the circulatory and lymph systems where they transform into antibody-producing plasma cells when exposed to antigens.

 

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B Cells: Type of lymphocyte responsible for antibody-mediated immunity; mature in the bone marrow and circulate in the circulatory and lymph systems where they transform into antibody-producing plasm . . . View Full Definition

Helper T Cells: A type of lymphocyte that stimulates the production of antibodies by activating B cells when an antigen is present.

Plasma Cells: Cells produced from B cells that synthesize and release antibodies.

Suppressor T Cells: T cells that slow down and stop the immune response of B cells and other T cells. Immune system cells that shut off the antibody production when an infection is under control.

B Memory Cells: Long-lived B cells that are produced after an initial exposure to an antigen and play an important role in secondary immunity. They remain in the body and facilitate a more rapid responce if . . . View Full Definition

Marimba: Percussion instrument that is a mellower version of the xylophone: of African origin

Marketability: A negotiable security is said to have good marketability if there is an active secondary market in which it can easily be resold.

Marie Brizard: French producer of high quality liqueurs.

Marching Band: Instrumental ensemble for entertainment at sports events and parades, consisting of wind and percussion instruments, drum majors/majorettes, and baton twirlers.

Marine Biome: The aquatic biome consisting of waters containing 3.5% salt on average; includes the oceans and covers more than 70% of the Earths surface; divided into benthic and pelagic zones.