HS61_Ch14 Terms - Chapter 14: Lymphatic and Immune Systems...

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Chapter 14: Lymphatic and Immune Systems Question Answer Acquired Immunity Formation of antibodies and lymphocytes after exposure to an antigen. Acquired Immunodeficiency Syndrome (AIDS) Syndrome associated with suppression of the immune system and marked by opportunistic infections, secondary neoplasm, and neurologic problems. Caused by the human immunodeficiency virus (HIV), which destroys helper T-cells (also known as CD4 cells). Allergen Substance capable of causing a specific hypersensitivity in the body. An allergen is a type of antigen. Allergy Abnormal hypersensitivity acquired by exposure to an antigen. Anaphylaxis Extraordinary hypersensitivity to an antigen occurs throughout the body, leading to hypotension, shock, respiratory distress, and edema of the larynx. Antibody Protein produced by B-cell lymphocytes to destroy antigens. Antigen Substance that the body recognizes as foreign, evoking an immune response. Atopic Dermatitis Chronic dermatitis of unknown etiology found in patients with a history of allergy. Atopy Type I hypersensitivity or allergic reaction for which there is a genetic predisposition. Autoimmunity Disease Chronic, disabling diseases caused by the abnormal production of antibodies against normal body tissues. B-Cell Lymphocyte that originates in the bone marrow and transforms into a plasma cell to secrete antibodies. CD4 Cell Count Measures the number of CD4 T-cells (helper T- cells) in the blood. Normal count is between 500 1
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Chapter 14: Lymphatic and Immune Systems and 1500 cells/cubic mm. If a CD4 count falls below 200 to 250, it is recommended to start treatment with anti-HIV drugs. CD4 Cells Helper T-cells that carry the CD4 protein antigen on their surface. HIV binds to CD4 and infects and kills T-cells bearing this protein. Cell-Mediated Immunity Immune response involving T-lymphocytes, where antigens are destroyed by direct action of cells, as opposed to antibodies. Cytokine
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This note was uploaded on 08/13/2009 for the course HS 61 taught by Professor Elliesmith during the Summer '09 term at College of the Desert.

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HS61_Ch14 Terms - Chapter 14: Lymphatic and Immune Systems...

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