Human Hazards883
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Human Hazards883
Unit 6 of APES, and we are exploring the Hazards of being Human
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Poison

Poison | Human Hazards883 | Scoop.it

poisons are substances that cause disturbances to organisms.

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Acute, chronic, and threshold

Acute health effects are characterized by sudden and severe exposure and rapid absorption of the substance.

Chronic health effects are characterized by prolonged or repeated exposures over many days, months or years. Symptoms may not be immediately apparent. Chronic health effects are often irreversible.

Threshold-: the point at which a physiological or psychological effect begins to be produced <has a high threshold for pain>

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Risks

Risk is the potential that a chosen action or activity (including the choice of inaction) will lead to a loss (an undesirable outcome).

Risk assesment-is the scientific process of estimateing how much harm a particular hazard can cause to a humans health

Risk management- involves deciding whether or how to reduce a risk to a certain level and at what cost.

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Dose-responce curve

Dose-responce curve | Human Hazards883 | Scoop.it

The dose-response relationship, or exposure-response relationship, describes the change in effect on an organism caused by differing levels of exposure (or doses) to a stressor (usually a chemical) after a certain exposure time

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Toxin - Definition and More from the Free Merriam-Webster Dictionary

Toxin - Definition and More from the Free Merriam-Webster Dictionary | Human Hazards883 | Scoop.it

Definition of toxin from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games.A Toxin poisonous substance that is a specific product of the metabolic activities of a living organism and is usually very unstable, notably toxic when introduced into the tissues, and typically capable of inducing antibody formation

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ATSDR Home

ATSDR Home | Human Hazards883 | Scoop.it

The Agency for Toxic Substances and Disease Registry (ATSDR), based in Atlanta, Georgia, is a federal public health agency of the U.S. Department of Health and Human Services. ATSDR serves the public by using the best science, taking responsive public health actions, and providing trusted health information to prevent harmful exposures and diseases related to toxic substances.

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Mechanism of Botulinum Toxin

Botulinum is a bacterial toxin produced by a bacteria Clostridium botulinum that causes the most severe form of food poisoning. The disease is called Botulis...
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infections, diseases, pathogens, and vectors

Infections-An infection is the colonization of a host organism by parasite species. Infecting parasites seek to use the host's resources to reproduce, often resulting in disease.

Disease-A disease is an abnormal condition affecting the body of an organism. It is often construed to be a medical condition associated with specific symptoms and signs

Pathogens-or infectious agent - in colloquial terms, a germ — is a microbe or microorganism such as a virus, bacterium, prion, or fungus that causes disease in its animal or plant host

Vectors-In epidemiology, a vector is any agent (person, animal or microorganism) that carries and transmits an infectious pathogen into another living organism

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LCt50/ED

LCt50 (Lethal Concentration & Time) of a toxin, radiation, or pathogen is the dose required to kill half the members of a tested population after a specified test duration. An effective dose (ED) in pharmacology is the dose or amount of drug that produces a therapeutic response or desired effect in some fraction of the subjects taking it.

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What makes any compound harmful to humans?

A toxin or poison does not have to be harmful to humans, but it just depends upon the amount exerted to the human, the duration of time exposed to it. It also depends on the size and age of the organism because if it is bigger it takes more of the substance to affect it, and the age because whether or not its defenses could withstand this attack. It also depends on the ability to detoxify within the alotted time for the defenses to defend the body or die from the toxin. Sensitivity could also affect the ability to deflect the attacks from the substance.Lastly, its synergistic effect, or An effect arising between two or more agents, entities, factors, or substances that produces an effect greater than the sum of their individual effects.

Read more: http://www.businessdictionary.com/definition/synergistic-effect.html#ixzz1oGBwYWzf

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