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LE Immune Vocab

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Term
Definition
pathogen   an organism that invades the body causing disease  
virus   nonliving particle of protein & genetic material that reproduces by invading the cell of a living organism  
bacteria   any one of many single celled organisms without a distinct nucleus  
fungus   mostly multicellular with cell walls made of chitin; heterotrophs  
protist   single celled organism with membrane bound genetic material & organelles  
host cell   organism that provides a home for the pathogen  
bacteriophage   a group of viruses that infect specific bacteria, usually causing their disintegration or dissolution  
Capsid   arrangement of proteins to determine shape of virus & what cells can be identified  
receptor site   protein molecules found on the cell membrane that can receive chemical messages from other cells; fit like lock & key  
lytic cycle   the virus reproduces, then weakens the cell wall enough that the cell will lyse, or burst open  
lysogenic cycle   virus incorporates its. genetic material into the genome of its host, allowing the. virus to lie dormant  
retrovirus   family of single-stranded RNA viruses having a helical envelope and containing an enzyme that allows for a reversal of genetic transcription, from RNA to DNA rather than the usual DNA to RNA  
viroids   single circular strand of RNA with no protein coats; causes infectious diseases in several plants  
diplo growth pattern   paired arrangement  
staphylo growth pattern   resembles clusters of grapes  
strepto growth pattern   chain arrangement  
endospores   tiny structures that contain bacteriums DNA & small amount of cytoplasm, encased by a tough outer covering that resists drying out, temperature extremes and harsh chemicals  
disease   breakdown of the homeostatic balance in the body  
lymph nodes   glands found throughout lymph system that cleanse lymph as it travels through the system  
nonspecific body defenses   immediate response, fights everything; skin, mucus, inflammation, fever  
specific body defenses   fights specific antigens with specific antibodies & creates memory cells to fight the antigen next time it is encountered  
T cells   bind to antigens & directly attack infected cells, helper T cells stimulate activity of killer T cells & production of B cells  
B cells   most secrete antibodies; some become memory cells to fight infection when reintroduced to body  
immune response   the response of the body to fight off a pathogen  
vaccine   dead or weakened form of a virus that is injected into a person to initiate the immune response and formation of memory cells without having the disease  


   






 
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Created by: jgarrisi