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LE Immune Vocab

TermDefinition
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
Created by: jgarrisi