Multiple Choice QuestionWhich of the following statements about the potency (strength) of toxic substances is true?Multiple choice question.The potency of toxic substances varies, but minute doses are never lethal.If something is toxic, it is by definition lethal at minute doses.Potency is predictable because all people respond similarly to a given dose.For some toxic substances, a millionth of a gram (an amount invisible to the naked eye) can be lethal.

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.

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.

Which of the following parameters is used to indicate the ability of a drug to produce the desired therapeutic effect relative to a toxic effect? * (a) Potency (B) Intrinsic activity (C) Therapeutic Index (D) Efficacy (e) Bioavailability

Multiple Select QuestionSelect all that applyWhich of the following statements about chronic and acute exposure and effects are correct?Multiple select question.Chronic exposures are rarely life-threatening because the dosage in each exposure is generally very small.Acute exposures, because they involve short contact with a toxic chemical, rarely have long-term effects.Acute exposure involves a single contact with a toxic chemical. It may last a few seconds or a few hours.Chronic exposure involves continuous or repeated contact with a toxic substance over a long period of time (months or years).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.