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Immunity

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magovate's version from 2017-05-04 04:07

Section

Question Answer
Destroys cells that are infected by a pathogenCell-mediated immunity
Targets antigens found outside of cellsAntibody-mediated immunity
Skin, hair, mucous membranes, surface secretionsPhysical barriers
Neutrophils, eosinophils, monocytes/macrophagesPhagocytic cells
Histamine, heparin, complement, interferons, cytokinesChemical mediators
Are cells that consume pathogens and cellular debrisPhagocytes
Most common phagocyteNeutrophil
Much less common, but can assist in phagocytosisEosinophils
Promote inflammatory response and attract immune cellsHistamine and heparin
Proteins used as chemical messengers in a variety of immune responsesCytokines
Group of plasma proteins that activate in a cascade reactionComplement
Stimulate in normal cells the production of proteins that interfere with viral replicationInterferons
Are 20-40% of circulating WBCsLymphocytes
Can release chemicals that lyse infected cells – active in cell-mediated immunityCytotoxic T cells
Stimulate the activation of other T cells and B cells in all forms of specific immunityHelper T cells
Control sensitivity of immune responseSuppressor T cells
Used in antibody-mediated immunity; Plasma cells that create and release antibodiesB cells
Patrol peripheral tissues for abnormal cells; immunological surveillance, innate immunityNK cells
are proteins that display antigensMajor histocompatibility complexes (MHCs)
must be presented to trigger an immune responseAntigens
The lymphocytes – helper T cells, cytotoxic T cells, and B cells – will rapidly divide in order to mount a large-scale immune responseProliferation
targets intracellular pathogens by destroying the infected cells with cytotoxic T cellsCell-mediated immunity
immunity targets extracellular pathogens by attacking them with antibodies produced by plasma cells (differentiated B cells)Antibody-mediated
small, soluble proteinsAntibodies
made of two parallel pairs of polypeptide chains – light chains and heavy chainsAntibodies
allow the antibody to perform various immune functionsConstant segment
give the antibody its specificityVariable segments
are inappropriate or excessive immune responses to antigensAllergies
being naturally exposed to an antigen and respondingActive natural
vaccinationActive artificial
maternal antibodies across placenta or in milkPassive natural
Lab-made antibodies; antivenomPassive artificial
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