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Paij Porter
Physiology-Immunity
| Term | Definition |
|---|---|
| innate immunity | it is in place before a person is exposed to a particular harmful particle or condition; do not act on only one or two specific invaders but rather provide a more general defense by simply acting against a wide variety of particles recognized as nonself |
| adaptive immunity | part of the body’s third line of defense, is orchestrated by two different classes of a type of white blood cell called the lymphocyte; requires activation of lymphocyte populations, which then begin their immune attack of specific antigens |
| species resistance | a phenomenon in which the genetic characteristics common to a particular kind of organism, or species, provide defense against certain pathogens |
| phagocytosis | the ingestion and destruction of microorganisms or other small particles |
| diapedesis | The movement of phagocytes from blood vessel to inflammation site |
| natural killer cells (NK) | NK cells are a group of lymphocytes that kill many types of tumor cells and cells infected by different kinds of viruses. |
| interferon (IFN) | signal proteins that interfere with the ability of viruses to cause disease. |
| complement system | Group of enzymes that produce a cascade of reactions resulting in a variety of immune responses |
| antigens | macromolecules (large molecules) that induce the immune system to make certain responses.Many antigens that enter the body are macromolecules located in the walls or outer membranes of microorganisms or the outer coats of viruses |
| antibodies | proteins of the family called immunoglobulin; function to produce antibody-mediated immunity |
| natural immunity | Exposure to the causative agent is not deliberate |
| artificial immunity | Exposure to the causative agent is deliberate |
| active natural immunity | exposure to an infection, then acquires an immunity to a subsequent infection |
| passive natural immunity | A fetus receives protection from the mother through the placenta, or an infant receives protection through the mother’s milk |
| active artificial immunity | Injection of the causative agent, confers immunity |
| passive artificial immunity | Injection of protective material (antibodies) that was developed by another individual’s immune system |
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paijwright
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