I want to know the biological factors affecting toxicity?
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There are liver enzymes (Cytochrome P450 oxidase) that detoxify our organism.\nSome people have low leavels of those enzymes and are prone to bigger toxicity.
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If you're looking for a more intellectual topic than constructive, try laughter.  Research what causes it, what chemicals are involved, its physical and emotional effects, and other things.  Here are a couple of links to laughter-related topics.  I hope that this helps!  This is what I'm doing for my biology project, so you asked this question at the right time!
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Biotic factors are not only the organisms themselves, but also their relationship and effect on the surroundings. For example, forest soil aeration might be caused by worms living underground, which might help the trees grow better, etc.
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This is a great site for students:\nhttp://www.cancerquest.org/index.cfm?page=2225\n\nI have used it in my classroom to investigate the biology behind cancer! Hope it helps!
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Chronic adverse effects\n.\n\n    Chronic effects of prolonged low level exposure have recently showed up.  Among various summaries we link to an information site run by ASTDR. Skin pigmentation, keratoses and skin cancers were found by  Tseng in Taiwan in 1966 among people who drank from arsenic contaminated wells (but no effect was seen below about 150 parts per billion (ppb),  which might  therefore be a biological threshold) and a very high incidence of lung, bladder and other cancers was found in Taiwan by Dr Chien-Jen  Chen in 1986 and by Dr  Allan  Smith and collaborators in Chile in 1993.  These convinced WHO to  recommend lowering the regulatory level from 50 ppb to 10 ppb for arsenic in water.   It appears that there are no data on humans to contest the idea that prolonged exposure to low doses is dangerous.  Although arsenic was used medicinally in "Fowler's  Solution" (1% arsenite), prolonged use had led to these chronic skin effects.  This was observed as early as 1888 by Hutchinson. A follow up of a number of English patients treated with  Fowler's Solution has been reported by Dr Susan Evans in published literature, in a report at the February 1998 conference in Dhaka  and in a presidential address by Susan Evans to the Liverpool Medical Institute, which is available for download in PDF format.   This shows that the use of "Fowler's solution" (which is primarily medicinal arsenic) in the UK is probably responsible for 5 bladder cancer cases among the patients among  whom only 1.6 were expected  from natural causes. The arsenic dose was equivalent to an average lifetime dose that would come from drinking water with about 25 ppb of arsenic therein.\n\n.\n\n  After several years of low level arsenic exposure, various skin lesions appear. These are manifested by hyperpigmentation  (dark spots), hypopigmentation (white spots) and keratoses of the hands and feet.  After a dozen or so years skin cancers are expected. Twenty or thirty  years after exposure to 500 ppb of arsenic, internal cancers (lung, kidney,  liver and bladder) appear among 10% of all exposed.  Moreover, the  dose-response relationship for these internal cancers is consistent with being linear with no threshold.  Photographs of a  number of victims  of  this  poisoning  are available both from Bangladesh and from Inner  Mongolia.\n\n. . \nThe Effect  of  diet\n\n\n    An important issue for coping with arsenic exposure is the effect of diet.  A general issue can be stated:  there is frequently more than one cause of a cancer or a lesion.  For example lung cancer can be caused by cigarette smoking or asbestos or both together, in a synergistic way such that the risks multiply (rather than add) when both are present.  In the USA it has been found that people who have a good diet of fresh fruit and vegetables (5 servings per day) have half the risk of many cancers, including lung cancers caused by cigarettes, as those without a good diet.  By analogy, one might expect that the lung cancer risk from arsenic will be less among those with a good diet.   Anecdotal indications from Bangladesh suggests that a good diet reduces skin lesions,  and the effect is seen in West Bengal,  but the effect is small and the authors recommend that effort is better spent on obtaining pure water.   Nonetheless  epidemiological studies to confirm this are highly desirable.    \n\n\n    There are several specific chemicals that have been suggested that would either (i) help to prevent arsenic lesions by rapid removal of arsenic from the body or (ii) help to cure arsenic lesions.  Encouragement of methylation of the arsenic probably accelerates methylation, but the methylation has been suggested as a cause of internal cancers.   The specific chemical that has come to the mind of many health experts is selenium.  It was noted in the 1930s that effects of excess selenium can be counteracted by adding arsenic to the diet because As and Se combine.
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Many antidotes are actually antibody solutions- If you have a toxin in your body, and you are given on antibody (made in a culture dish, or by a different animal) then the antibody will bind to the toxin (or bacterial protein, etc) and decrease it's toxicity.  I won't go into the biochemistry of it.
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All sorts of factors affect the suitability of the human body fluids to sustain life; these include properties like temperature, salinity, and acidity, and the concentrations of nutrients such as glucose, various ions, oxygen, and wastes, such as carbon dioxide and urea. Since these properties affect the chemical reactions that keep bodies alive, there are built-in physiological mechanisms to maintain them at desirable levels.\n\nHowever, it should be noted that homeostasis is not the reason for these ongoing unconscious adjustments. Homeostasis should be thought of as a general characterization of many normal processes in concert, not their proximal cause per se. Moreover, there are numerous biological phenomena which do not conform to this model, such as anabolism.
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INTRODUCTION\nPollution, contamination of Earth’s environment with materials that interfere with human health, the quality of life, or the natural functioning of ecosystems (living organisms and their physical surroundings). Although some environmental pollution is a result of natural causes such as volcanic eruptions, most is caused by human activities.\n\nThere are two main categories of polluting materials, or pollutants. Biodegradable pollutants are materials, such as sewage, that rapidly decompose by natural processes. These pollutants become a problem when added to the environment faster than they can decompose (see Sewage Disposal). Nondegradable pollutants are materials that either do not decompose or decompose slowly in the natural environment. Once contamination occurs, it is difficult or impossible to remove these pollutants from the environment. \n\nNondegradable compounds such as dichlorodiphenyltrichloroethane (DDT), dioxins, polychlorinated biphenyls (PCBs), and radioactive materials can reach dangerous levels of accumulation as they are passed up the food chain into the bodies of progressively larger animals. For example, molecules of toxic compounds may collect on the surface of aquatic plants without doing much damage to the plants. A small fish that grazes on these plants accumulates a high concentration of the toxin. Larger fish or other carnivores that eat the small fish will accumulate even greater, and possibly life-threatening, concentrations of the compound. This process is known as bioaccumulation.\n\nTYPES OF POLLUTION\nPollution exists in many forms and affects many different aspects of Earth’s environment. Point-source pollution comes from specific, localized, and identifiable sources, such as sewage pipelines or industrial smokestacks. Nonpoint-source pollution comes from dispersed or uncontained sources, such as contaminated water runoff from urban areas or automobile emissions.\n\nThe effects of these pollutants may be immediate or delayed. Primary effects of pollution occur immediately after contamination occurs, such as the death of marine plants and wildlife after an oil spill at sea. Secondary effects may be delayed or may persist in the environment into the future, perhaps going unnoticed for many years. DDT, a nondegradable compound, seldom poisons birds immediately, but gradually accumulates in their bodies. Birds with high concentrations of this pesticide lay thin-shelled eggs that fail to hatch or produce deformed offspring. These secondary effects, publicized by Rachel Carson in her 1962 book, Silent Spring, threatened the survival of species such as the bald eagle and peregrine falcon, and aroused public concern over the hidden effects of nondegradable chemical compounds.\n\nA  Air Pollution \nHuman contamination of Earth’s atmosphere can take many forms and has existed since humans first began to use fire for agriculture, heating, and cooking. During the Industrial Revolution of the 18th and 19th centuries, however, air pollution became a major problem. As early as 1661 British author and founding member of the British Royal Society John Evelyn reported of London in his treatise Fumifugium, “… the weary Traveller, at many Miles distance, sooner smells, than sees the City to which he repairs. This is that pernicious Smoake which fullyes all her Glory, superinducing a sooty Crust or Furr upon all that it lights.…”\n\nUrban air pollution is commonly known as smog. The dark London smog that Evelyn wrote of is generally a smoky mixture of carbon monoxide and organic compounds from incomplete combustion (burning) of fossil fuels such as coal, and sulfur dioxide from impurities in the fuels. As the smog ages and reacts with oxygen, organic and sulfuric acids condense as droplets, increasing the haze. Smog developed into a major health hazard by the 20th century. In 1948, 19 people died and thousands were sickened by smog in the small U.S. steel-mill town of Donora, Pennsylvani
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Cytotoxicity is the quality of being toxic to cells. Examples of toxic agents are a chemical substance or an immune cell.\n\nCytotoxicity can be measured by the MTT assay.\n\nCytotoxic activity is the action that the substance takes that makes it toxic to cells
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Try browsing this site\n\nhttp://www.elfqrin.com/docs/biospw.html
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You can go to this site and find information on fish biochemistry:\n\nhttp://www.fishnet.dk/networks/fibp/fibp.htm
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this might help http://www.redorbit.com/news/science/554072/diseases_caused_by_pollution_cost_state_health_care_according_to/index.html?source=r_science
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try going to www.aol.com and type in organism by biochemical tests that might help you
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Do you mean: The Hundred-Year Lie (on the prevalence of toxic chemicals) by Randall Fitzgerald?\nHere's a link to an interview with him below.
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increase in acidity....\n\nread your textbook, PLZ
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I found a primary article talking about Cyanobacterial blooms causing liver cancer in China. It is mentioned in the first paragraph of the main body. Hope this helps!
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It is not a chemical answer.  It is Biological Chemistry, or the chemistry of a living creature.  It is caused by a surge of adrenaline released by the Pituitary Gland in your brain.