Q Question 1 1 / 1 pts I watched all video lectures and clips and read the assigned materials in this lesson. Question 2 1 / 1 pts When a chemical builds up in an organism over time faster than it is excreted or metabolized it is called Question 3 1 / 1 pts If you are exposed to a chemical substance regularly for 14 months it would classified as ____ duration. Question 4 1 / 1 pts Which of these is NO LONGER a source of lead exposure to anyone in the U.S.? Question 5 1 / 1 pts What is the primary source of arsenic that leads to such high levels in American-grown rice?

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