1. Water Pollution #2: Heavy Metals What is it? Where is it? How did it get there? Why is it bad? How do we get rid of it?

3. The Two Big “Stars” “Lead” Zeppelin Freddie Mercury

7. Why is it bad? Lead

8. How does lead cause these affects? Mimics zinc in its ability to bind (and block) a glutamate receptor Normal function: excite neurons for plasticity--> learning and memory Continuously excited --> excitotoxicity --> cell death

15. Results in an aquatic ecosystem Bacteria convert it into methyl mercury- more toxic! What happens as it is passed along the food web? Let’s find out!