Washington State Water Distribution Manager (WDM) 1 Certification Practice Exam

Lead toxicity rises with the amount someone is exposed to, and children are especially vulnerable because their developing nervous system is more easily affected. The more lead that enters the body, the greater the potential for harm, including cognitive and developmental problems. Among the options, the pairing that best reflects both the dose–response aspect and the increased vulnerability of children is that lead is hazardous when consumed in high amounts, particularly for children. While even small amounts can be harmful to children, larger exposures clearly pose greater risk, and adults generally show fewer acute neurodevelopmental effects at the same exposure level.