Select all that applyIn assessing the danger of toxic substances, which of these statements are true?Multiple select question.Any exposure to toxic substances is unjustifiable.The dose makes the poison.Our increasing ability to detect traces of a substance sometimes means that though we can detect it, the level may be too low to cause harm.If a toxin can be detected, it is dangerous, no matter how low the level.Need help? Review these concept resources.

Multiple Select QuestionSelect all that applyOf the many factors that determine whether a particular chemical will prove to be dangerous, which of the following are based on the nature of the chemical agent itself?Multiple select question.The individual exposed is particularly sensitive to the chemical agent.The chemical agent is water-soluble.The chemical agent is not biodegradable and thus is persistent in the environment.The chemical agent was ingested only if one ate the skin of the apple.

Multiple Select QuestionSelect all that applyWhich of the following statements are reasonable conclusions that can be drawn from a recent headline that announced the discovery of 23 pesticides in 16 food samples?Multiple select question.Pesticide residues are not necessarily harmful, for a substance produces a harmful effect only if it reaches within the body in a high enough dose.Not only are there more toxins in the environment today, they are more widespread and more highly concentrated now than in the past.Any amount of a toxic substance is unacceptable so a reliable way to establish danger is to count the number of compounds detected.The mere presence of a toxin is insignificant without considering how much is there, where it is located, how accessible it is, and who is exposed.The headline is evidence that our current level of exposure to toxic substances is unjustifiable.Need help? Review these concept resources.

Multiple Select QuestionSelect all that applyWhich of the following statements correctly describes how factors related to the individual influence how they respond to toxins in the environment?Multiple select question.Age affects susceptibility to toxins, as chemicals that might be relatively harmless to adults may be dangerous to young children.Immunological status affects susceptibility to toxins. A healthy individual may be insensitive to doses of toxins dangerous to someone who is ill.Environmental regulations may affect susceptibility to toxins. Lack of protective laws may increase an individual's sensitivity to toxins.Where an individual lives determines his/her susceptibility to the chemical.Need help? Review these concept resources.

What does the saying "the dose makes the poison" mean?Multiple choice question.All substances have equivalent potential for harm, so exposure to any of them is risky.Any amount of a dangerous substance is unacceptable and counting the numbers of compounds detected is a reliable way to establish danger.Most substances are toxic at some level of exposure depending on the substance and the nature of the exposure.What matters is the amount of a toxic substance present; whether or not we are exposed to the toxin is not relevant.Need help? Review these concept resources.

Which of the statements below accurately captures the relationship between toxicity and potency?Multiple choice question.The potency of toxins varies, but knowing the level at which a substance is directly toxic makes it possible to establish safe levels for exposure.Though categorizing toxins based on potency is useful, it is complicated by differences in individual and species reactions to particular chemicals.Studies of relative toxicity show that while synthetic toxins are very potent, natural toxins have low potency and are toxic only in large doses.Need help? Review these concept resources.