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Ch. 14 Env Haz Pt. 2

Environmental Ecology- Environmental Hazards & Human Health

Malaria Caused by a protozoan (waterborne) parasite Protozoan Parasite-->Mosquito-->Human Female Anopheles Mosquito carries the disease. 1/5 at risk, destroys RBC- brain damage, #1 killer, no vaccine.
Caused Spread of Infectious Diseases 1. Forest Clearing--> spread of vectors 2. Illegal trade of wild species (exotics) 3. Global trade of livestock & food
Reduce the Spread of Infectious Diseases 1. Reduce unnecessary use of antibiotics 2. Improve drinking water quality 3. Draining of swamps & marshes (breeding sites for vectors)
Chemicals Hazards Two categories... 1. Hazardous Chemicals 2. Toxic Chemical
Hazardous Chemicals Can Cause harm to humans/animals 1. Flammable 2. Explosive 3. Irritate 4. Toxic cause sickness/death
Human System Affected 1. Immune System 2. Nervous System 3. Endocrine
Immune System 80% is controlled by digestive system WBC's produce antibodies to fight antigens (produced by bacteria/viruses)
Probiotic Helps restore good bacteria in digestive system. (Acidophilus)
Nervous System Destroy nerve cells Neurotoxins- PCB's- chemicals used in industry; lead; mercury; pesticides
Endocrine System that produces hormones Effects sexual reproduction, growth, behavior/learning
Toxic Chemicals Chemicals that cause temporary/permeant harm/death to humans/animals 1. Mutagens 2. Teratogens 3. Carcinogens
Mutagens Produce genetic changes in DNA (mutations) Ex. Cancer Nitrates- Food preservatives
Teratogens Chemicals that cause harm & birth defects to fetus/embryos Ex. Alcoholic beverages, chlorine, lead, mercury, PCB'S
Carcinogens Chemicals that produce cancer (cells divide erratically-->tumor--> met (spread)
Created by: ginganinjaem