Infection and response key words - year 9 biology

Communicable Disease

a disease that can be transferred from one organism to another

Pathogen

a disease-causing micro-organism

Vector

an organism that can spread a disease

MRS GREN

the seven life processes: Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, Nutrition

Strain

a species of virus

Host

the organism lived on or in by a parasite

HIV

Human Immunodeficiency Virus

AIDS

Acquired Immune Deficiency Syndrome

Prokaryotic

single-celled organisms that don't have a membrane-bound nucleus

STD

sexually transmitted disease

Genus

a rank in classification below family but above species

Eukaryotic

an organism with a nucleus

Vaccine

introducing a small or weakened version of a pathogen into you body to help build immunity

Phagocyte

a cell that engulfs harmful micro-organisms in the bloodstream/tissue

Lymphocyte

white blood cells that attack pathogens by producing antibodies

Antibiotics

substances that control the spread of bacteria in the body by killing them/stopping their reproduction

Antibody

a protein produced by the immune system that attacks antigens that get into the body

Antigen

a protein on the surface of a substance that triggers an immune response

Herd immunity

when a very high percentage of a population have been vaccinated against a disease

Painkillers

chemicals that relieve symptoms but do not cure a disease

Antibiotic resistance

the ability of bacteria to survive after exposure to antibiotics

Synthetic

a material made by a chemical process