Ch 24 Vocab Flashcards
an organism that causes disease
pathogen
a disease that is spread from one living thing to another or through to environment
communicable disease
a condition that occurs when pathogens enter the body, multiply, and damage body cells
infection
pieces of genetic material surrounded by a protein coat
viruses
single-celled microorganisms
bacteria
a substance that kills cells or interferes with their functions
toxin
an organism, usually an arthropod, such as a tick, that carries and transmits pathogens to humans or other animals
vectors
a network of cells, tissues, organs, and chemicals that fights off pathogens
immune system
a reaction to tissue damage caused by injury or infection
inflammatory response
a white blood cell that attacks invading pathogens
phagocyte
a substance that is capable of triggering an immune response
antigen
the state of being protected against a particular disease
immunity
a specialized white blood cell that coordinates and performs many of the functions of specific immunity
lymphocyte
a protein that acts against a specific antigen
antibody
a preparation of dead or weakened pathogens that are introduced into the body to stimulate an immune response
vaccine