Definitions In Biology. Essay

3211 words - 13 pages

1.Active Immunity: Immunity resulting from the development of antibodies in response to the presence of an antigen, as from vaccination or exposure to an infectious disease.Adrenal: 1.At, near, or on the kidneys.2. 2 Of or relating to the adrenal glands or their secretions.Aids: A severe immunological disorder caused by the retrovirus HIV, resulting in a defect in cell-mediated immune response that is manifested by increased susceptibility to opportunistic infections and to certain rare cancers, especially Kaposi's sarcoma. It is transmitted primarily by venereal routes or exposure to contaminated blood or blood productsAlcoholism: 1.The compulsive consumption of and psycho physiological dependence on alcoholic beverages.2.2.A chronic, progressive pathological condition, mainly affecting the nervous and digestive systems, caused by the excessive and habitual consumption of alcohol.3.Temporary mental disturbance and muscular in coordination caused by excessive consumption of alcohol.Allergy1.An abnormally high sensitivity to certain substances, such as pollens, foods, or microorganisms. Common indications of allergy may include sneezing, itching, and skin rashes.3.2.Informal. An adverse sentiment; antipathyAlveolus: 1.A small angular cavity or pit, such as a honeycomb cell.2.A tooth socket in the jawbone.4.3.A tiny, thin-walled, capillary-rich sac in the lungs where the exchange of oxygen and carbon dioxide takes place. In this sense, also called air sac.5.Amino acid: An organic compound containing both an amino group (NH2) and a carboxylic acid group (COOH), especially any of the 20 compounds that have the basic formula NH2CHRCOOH, and that link together by peptide bonds to form proteins.Antibody: A protein substance produced in the blood or tissues in response to a specific antigen, such as a bacterium or a toxin. Antibodies destroy or weaken bacteria and neutralize organic poisons, thus forming the basis of immunity.6.2.An object composed of antimatter.7.Antigen: A substance that when introduced into the body stimulates the production of an antibody. Antigens include toxins, bacteria, foreign blood cells, and the cells of transplanted organs.8.Anus: The opening at the lower end of the alimentary canal through which solid waste is eliminated from the body.9.Atherosclerosis A form of arteriosclerosis characterized by the deposition of atheromatous plaques containing cholesterol and lipids on the innermost layer of the walls of large and medium-sized arteries.Atrium: Architecture. A rectangular court, as:. a. A usually skylighted central area, often containing plants, in some modern buildings, especially of a public or commercial nature. b. The open area in the center of an ancient Roman house. c. The forecourt of a building, such as an early Christian church, enclosed on three or four sides with porticoes.10.2.Anatomy. A bodily cavity or chamber, especially either of the upper chambers of the heart that receives blood from the veins and forces it...

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