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Science chap.23

The Immune System and Disease

acquired immunity arising from exposure to antigens
AIDS a disease of the immune system characterized by increased susceptibility to opportunistic infections, as pneumocystis carinii pneumonia and candidiasis, to certain cancers, as Kaposi's sarcoma
allergens any substance, often a protein, that induces an allergy
allergy an abnormal reaction of the body to a previously encountered allergen introduced by inhalation, ingestion, injection, or skin contact, often manifested by itchy eyes, runny nose, wheezing, skin rash, or diarrhea
antibodies any of numerous Y-shaped protein molecules produced by B cells as a primary immune defense, each molecule and its clones having a unique binding site that can combine with the complementary site of a foreign antigen, as on a virus or bacterium
antigens any substance that can stimulate the production of antibodies and combine specifically with them
antibiotics any of a large group of chemical substances, as penicillin or streptomycin, produced by various microorganisms and fungi, having the capacity in dilute solutions to inhibit the growth of or to destroy bacteria and other microorganisms
antihistamines any of certain compounds or medicines that neutralize or inhibit the effect of histamine in the body, used chiefly in the treatment of allergic disorders and colds
antiseptics used to get free from or cleaned of germs and other microorganisms
autoimmune disease a disease resulting from a disordered immune reaction in which antibodies are produced against one's own tissues, as systemic lupus erythematosus or rheumatoid arthritis
biopsy the removal for diagnostic study of a piece of tissue from a living body
cancer a malignant and invasive growth or tumor, esp. one originating in epithelium, tending to recur after excision and to metastasize to other sites
cholesterol a sterol, C27H46O, that occurs in all animal tissues, esp. in the brain, spinal cord, and adipose tissue, functioning chiefly as a protective agent in the skin and myelin sheaths of nerve cells, a detoxifier in the bloodstream, and as a precursor of ma
Communicable Diseases infectious diseases that are contagious(or"catching")
contaminated to make impure or unsuitable by contact or mixture with something unclean, bad, etc
disease a disordered or incorrectly functioning organ, part, structure, or system of the body resulting from the effect of genetic or developmental errors, infection, poisons, nutritional deficiency or imbalance, toxicity, or unfavorable environmental factors; il
gamma globulin a protein fraction of blood plasma that responds to stimulation of antigens, as bacteria or viruses, by forming antibodies: administered therapeutically in the treatment of some viral diseases
hereditary diseases diseases that"run in the family"
histamine .a histidine-derived amine compound that is released mainly by damaged mast cells in allergic reactions, causing dilation and permeability of blood vessels and lowering blood pressure
immune deficiency lacks the ability to attack pathogens
immune response reaction of the antibodios against antigens and pathogens
immune system a diffuse, complex network of interacting cells, cell products, and cell-forming tissues that protects the body from pathogens and other foreign substances, destroys infected and malignant cells, and removes cellular debris
immunity the condition that permits either natural or acquired resistance to disease
infectious disease is caused by a particular pathogen that enters, grows, and multiplies in the body of a host
interferon any of various proteins, produced by virus-infected cells, that inhibit reproduction of the invading virus and induce resistance to further infection.
lymphocytes a type of white blood cell having a large, spherical nucleus surrounded by a thin layer of nongranular cytoplasm
microbes a pathogenic bacterium
natural immunity is present without prior immunization
noninfectious disease is one that is usually caused by the presence or absence of some nonliving agent
pathogens any disease-producing agent, esp. a virus, bacterium, or other microorganism
phagocytes any cell, as a macrophage, that ingests and destroys foreign particles, bacteria, and cell debris
toxins any poison produced by an organism, characterized by antigenicity in certain animals and high molecular weight, and including the bacterial toxins that are the causative agents of tetanus, diphtheria, etc
vaccination the act or practice of vaccinating; inoculation with vaccine
vaccine any preparation used as a preventive inoculation to confer immunity against a specific disease, usually employing an innocuous form of the disease agent, as killed or weakened bacteria or viruses, to stimulate antibody production.
vector any agent that acts as a carrier or transporter, as a virus or plasmid that conveys a genetically engineered DNA segment into a host cell
Created by: daisy37311