Elements of Life- Our bodies

 

Read Chemical Storylines p3 - p6 then complete the following exercise

Your responses will be discussed in class and therefore it is important that you read and answer the questions carefully.
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1. Write the symbols of the 4 constituent elements which make up the human body?
2. What is the exact phrase used on p3 to describe a mole of an element?
3. What vital role does iron play in the body?
4. What are bones containing insufficient calcium known as?
5. How is calcium taken up in the bloodstream measured?
8. What is meant by the word radioactive isotope?
7. Why are there advantages of using a short-lived isotope of calcium in radioactive tracing?
8. What could be a disadvantage of using a short-lived isotope?
9. Strontium was taken up into children's bones instead of calcium. Find where they are in the periodic table. What do they have in common?
10. How can scientists tell how much strontium is in a compound?

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