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SLS Bio11 Virus SJ

Antibody a protein produced in the blood that fights diseases by attacking and killing harmful bacteria
Antigen a substance that causes the production of antibodies in the body
DNA deoxyribonucleic acid: the chemical, present at the centre of the cells of living things, that controls the structure and purpose of each cell and carries genetic information during reproduction
Host cell a living cell in which a virus reproduces
Lymphocyte a type of white blood cell involved in fighting disease and infection in the body
Lysogenic cycle one of two cycles of viral reproduction
Lytic cycle Viral reproduction. The viral DNA exists as a separate molecule within the bacterial cell, and replicates separately from the host bacterial DNA.
Membranous envelope All viruses lack cell membranes but some animal viruses have a membrane similar in composition to a cytoplasmic membrane surrounding their capsids called an envelope. This is a membrane envelope
mucous membrane A lubricating membrane lining all body passages and cavities. Examples of mucous membranes are those lining the mouth, nasal passages, vagina and urethra
nucleic acid core The part of a nuclear reactor where binary fission occurs.
phagocytic white blood cell A cell that engulfs and absorbs waste material, harmful microorganisms, or other foreign bodies in the bloodstream and tissues
primary line of defence a combination of physical and chemical barriers that prevent all types of foreign agents from penetrating the outer layer of the body. No specific foreign agent is targeted at this level
protein capsid The protein coat surrounding the nucleic acid of a virus
RNA ribonucleic acid, a nucleic acid present in all living cells
secondary line of defence White blood cells are found throughout the body and if a pathogen penetrates the first line of defence these cells play a role in inhibiting or destroying the pathogen before it harms the body.
tertiary line of defence f a foreign agent penetrates the non-specific barriers, there is a third line of defence available – the specific immune response.
viral specificity viral specificity means that a virus is selective in the organisms it infects, the type of cells and the disease it produces.
white blood cell Leukocyte, help fight infections by attacking bacteria, viruses, and germs that invade the body
Created by: 968976756505828



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