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20 Cards in this Set
- Front
- Back
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what is the function of the lymphatic vessel?
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they pick up excess tissue fluid, and return it to the bloodstream.
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what is the function of the right lymphati duct?
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it drains the lymph from the right arm and the right side of the head and thorax.
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what is the function of a lymph node?
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it helps protect the body by removing foreign materials such as bacteria and tumor cells.
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what are 3 lymphoid organs?
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the spleen, thymus gland, tonsils, and the Peyer's patches of the intestine.
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what is the function of the nonspecific defense system?
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it responds immediately to protect the body from all foreign substances.
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what is a pathogen?
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it is a harmful and disease-causing microorganisms.
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what are natural killer (NK) cells?
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they are a group of defensive cells that can lyse and kill cancer cells and virus-infected body cells.
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what is a fever?
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it is a abnormally high body temperature
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what is pus?
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its a mixture of dead or dying neutrophils, broken-down tissue cells, and living and dead pathogens.
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what is a secondary response?
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they are a much faster,more prolonged, and more effective because all te preparations for this attack have already been made.
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what is active immunity?
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the immunity produced by an encounter with an antigen.
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what is passive immunity?
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its a short-lived immunity obtained from the immune animal or human donor.
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when does neutralization occur?
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when the anitbodies bind to specific sites on bacterial exotoxins or on viruses that can cause cell injury.
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what are Helper T cells?
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they act like the managers or directors of the immune system.
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what are Suppressor T cells?
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the release chemicals to suppress the activity of the B and T cells.
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when does anaphylactic shock occur?
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when the allergen directly enters the blood and circulates rapidly though the body.
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what are autografts?
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they are the tissue grafts transplanted from one site to another in the same person.
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what do AIDS do to your immune system?
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they cripple the immune system by interfering with the activity of helper T cells.
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what are the monoclonal antibodies?
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the pure preparations of idenctical antibodies that exhibit specificity for a single antigen.
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what is a clone?
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it is the descendant of a single cell.
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