The Lymphoid System and Immunity (Bio201)
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29 terms
Terms | Definitions |
|---|---|
 pathogen | A foreign invader that may cause disease |
| veins | Anatomically, lymph vessels resemble ________. |
| lymphatic vessels, lymph, lymphoid organs, and lymphocytes | The major components of the lymphoid system |
| T cells, B cells, and NK cells | The three classes of lymphocytes found in the blood |
| helper T cells and suppressor T cells | Lymphocytes that assist in the regulation and coordination of the immune response |
| cell-mediated immunity | Cytotoxic T cells are the primary providers of what? |
| physical barriers, phagocytic cells,immunological surveillance, fever,interferons, complements, and inflammation | The body's nonspecific defenses that are present at birth |
| immunological surveillance | NK (natural killer) cells sensitive to the presence of abnormal cell membranes are primarily involved in what? |
| pyrogens | Circulating proteins that reset the thermostat in the hypothalamus, causing a rise in body temperature |
| specificity, versatility, memory, and tolerance | The four general properties of specific defenses |
| redness, swelling, heat, and pain | Major events associated with inflammation |
| direct attack by T cells and circulating antibodies | The two major ways the body "carries out" the immune response |
| phagocytes | The first line of cellular defense against pathogens |
| active immunity | Immunity resulting from natural exposure to an antigen in the environment |
| passive immunity | Immunity that results from the transfer of antibodies to an individual from some other source |
| induced active immunity | The basic principle behind vaccination to prevent disease involves what? |
| humoral responses; antigens | B cells are involved with ________ and create a chemical attack on ________. |
| plasma cells | The cells responsible for the production of circulating antibodies |
| B cells | The cells responsible for humoral immunity |
| cellular immunity | T cells are responsible for what immunity |
| allergies | In appropriate or excessive immune responses to antigens |
| an autoimmune disease | When an immune response mistakenly targets normal body cells and tissues |
| immunodeficiency disease | When the immune system fails to develop normally or the immune response is blocked in some way |
| provide protection against threats on an individual basis | Compared with nonspecific defenses, specific defenses |
| central nervous system | Lymphatic vessels are found in all portions of the body except what areas of the body? |
| helper T cells | The human immunodeficiency virus (HIV) that causes the disease known as AIDS selectively infects what immune cells? |
| spleen | Red blood cells that are damaged or defective are removed from the circulation by what organ? |
| subsequent infections that involve the same antigen | What do memory B cells respond to? |
| aids in temporary repair at an injury site,slows the spread of pathogens, facilitates permanent repair. | What is the importance of inflammation? |
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