Chapter 14. Lymphatic and Immune Systems - Medical Terms Flashcards Preview

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Flashcards in Chapter 14. Lymphatic and Immune Systems - Medical Terms Deck (76)
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1

acquired immunity

formation of antibodies and lymphocytes after exposure to an antigen

2

acquired immunodeficiency syndrome

depression or suppression of the immune system after exposure to the human immunodeficiency virus (HIV); marked by opportunistic infections, secondary neoplasms, and neurologic problems

3

adenoids

masses of lymphatic tissue in the nasopharynx

4

allergen

substance capable of causing a specific hypersensitivity in a body; an antigen

5

allergy

abnormal hypersensitivity acquired by exposure to an antigen (allergen)

6

anaphylaxis

exaggerated or unusual hypersensitivity to foreign protein or other substance

7

antibody

protein produced in the bloodstream by lymphocytes in response to a specific antigen, such as a bacterium or toxin; antibodies destroy or weaken antigens

8

antigen

substance (usually foreign) that stimulates the production of an antibody

9

asplenia

no spleen

10

atopy

intense allergic reaction (such as asthma) influenced by hereditary tendency or predisposition

11

autoimmune disease

chronic disabling disease caused by the abnormal production of antibodies to normal body tissues; multiple sclerosis, lupus erythematosus are examples

12

axillary nodes

lymph nodes under the arm

13

B cell

a lymphocyte that originates in bone marrow and transforms into a plasma cell to secrete antibodies

14

CD4 cell

Helper T cell that carries the CD4 protein antigen on its surface

15

cervical nodes

lymph nodes in the neck

16

complement system

proteins in the blood that help antibodies and T cells kill their target

17

cytokines

proteins that aid cells to destroy antigens; examples are interleukins and interferons

18

cytotoxic T cell

T cell lymphocyte that directly kills foreign cells; T8 cell

19

dendritic cell

a type of macrophage that captures antigens and presents them to T cells for destruction

20

ELISA

test to detect anti-HIV antibodies in blood; this is a screening test for AIDS

21

helper T cell

lymphocyte that aids a B cell lymphocyte in recognizing antigens and stimulating antibody production

22

Hodgkin disease

malignant tumor of lymphatic tissue in the spleen and lymph nodes

23

human immunodeficiency virus

virus (retrovirus) that causes AIDS

24

hypersensitivity

abnormal condition characterized by an exaggerated response of the immune system to an antigen

25

hypersplenism

syndrome of spleen enlargement (splenomegaly) and destruction of red blood cells (hemolysis)

26

immunity

body's ability to resist foreign organisms and toxins; this includes natural immunity and acquired immunity

27

immunoelectrophoresis

laboratory test that separates immunoglobulins (IgG, IgM, IgD, IgE, and IgA)

28

immunoglobulins

antibodies (proteins) secreted by B-cell lymphocytes (plasma cells)

29

immunosuppression

blocking or turning off the normal immune response

30

immunotherapy

use of immunologic techniques to treat disease