Heavy Metals Such as Mercury, Thallium, and Lead React with and Interfere

Q1: Dioxins<br>A)do not cause chloracne, a disfiguring skin

Q3: The amount of a substance which is

Q4: Carcinogens are chemicals that can cause<br>A)birth defects<br>B)mutations<br>C)cancer<br>D)hair

Q5: Medications and toxins alike can enter the

Q6: The toxin arsenic occurs naturally in the

Q7: PCBs, or polychlorinated biphenyls,<br>A)are used today extensively

Q8: Nerve cells (neurons) are connected by<br>A)cilia<br>B)ligaments<br>C)gaps or

Q9: The insecticides parathion and malathion interfere with

Q10: Neurotoxins interfere with the<br>A)Citric Acid cycle<br>B)Krebs cycle<br>C)Acetylcholine

Q11: The insecticide DDT (p-dichlorodiphenyltrichloroethane) is<br>A)highly toxic to