BioScience Dictionary

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Ot.

Found Lymph 111 times.

Displaying results 1 to 10.

1. 6-mercaptopurine
A toxic drug used to treat acute forms of leukemia (lymphocitic and granulocytic) by inhibiting DNA synthesis.

2. Adenoids
A mass of lymphatic tissue at the back of the throat and behind the nose. "The adenoids" is a popular term for the swelling or enlargement of this tissue, which sometimes occurs in children and which makes breathing difficult.

3. Adjuvant
* In pharmacology, a substance that, when added to a medicine, speeds or improves its action. * In immunology, a substance that is added to a vaccine to improve the immune response so that less vaccine is needed to produce more antibodies. Such adjuvants apparently work by speeding the division of lymphocytes and by keeping the antigen in the area where the immune response is taking place. In research with humans, aluminum phosphate and aluminum hydroxide gel are commonly used; in research involving lab animals, Freund's adjuvant is used.

4. Adoptive immunity
Immunity to disease or infection conferred on a previously non-immune individual by transferring lymphocytes from a previously immune individual to the non-immune individual.

5. African sleeping sickness
A disease affecting humans and other mammals in central Africa that is caused by the parasitic protozoa ns Trypanosoma brucei gambiense and Trypanosoma brucei rhodesiense and is transmitted by the tsetse fly. Symptoms include fever, chills, headache, vomiting, pain in the extremities, lymph gland enlargement, anemia, depression, fatigue, coma, and eventually death if left untreated. The trypanosome is able to evade the host's immune system by frequently changing the protein s on its outer surface, by which the immune system identifies intruders.

6. AIDS-related complex (ARC)
A set of symptoms, such as lymph node enlargement, fever, loss of weight, diarrhea, and minor opportunistic diseases associated with a weakened immune system, which indicates a less severe form of infection by the HIV virus than AIDS itself. In some cases this is diagnosed as a precursor to AIDS. Also known as "AIDS-related condition" or "AIDS-related syndrome".

7. Antigen processing / presenting cell
A type of cell which provokes an immune response from T lymphocyte s by binding foreign antigen s to their surfaces and then interacting with the T cells.

8. Appendix
The vermiform appendix (as opposed to other types of appendices) is an attachment of 8 to 13 cm, rich in lymphoid tissue, to the caecum.

9. 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 .

10. B lymphocyte (B cell)
A cell produced by the bone marrow which, when stimulated by an antigen , becomes either a memory cell or a plasma cell that forms antibodies against that antigen. Compare T lymphocyte .

View web definitions »

Learn more about Lymph »