Disease in which cells multiply uncontrollably and invade surrounding tissue.

• mutation
• cancer
• infectious disease
• transmissible disease

Chemicals, ionizing radiation, and viruses that cause or promote the development of uncontrolable growth

• mutagen
• carcinogen
• cancer
• teratogen

The amount of a potentially harmful substance an individual ingests, inhales, or absorbs through the skin.

• dose
• LD50
• median lethal dose
• dose-response curve

Study of the patterns of disease or other harmful effects from toxic exposure within defined groups of people to find out why some people get sick and some do not

• Toxicology
• pathology
• phrenology
• epidemiology

Amount of a toxic material per unit of body weight of test animals that kills half the test population in a certain time

• risk assessment
• risk management
• LD50
• LD60

Spread of malignant cells to other parts of the body

• metastasis
• mutagen
• cancer
• teratogen

Chemical or form of radiation that causes inheritable changes in the DNA molecules in the genes found in chromosomes

• teratogen
• mutagen
• carcinogen
• metastasis

Chemicals that can harm the human nervous system

• cytotoxins
• necrotoxin
• hemotoxins
• neurotoxins

A disease that is not spread from one person to another

• melanoma
• cystic fibrosis
• nontransmissible disease
• multiple sclerosis

Organism that produces disease

• pathogen
• Ebola
• tuberculosis
• maleria