For your post please include the following information about your blood or blood chemistry

For your post please include the following information about your blood or blood chemistry test:
1.  Give a generic description of the overall purpose of your test (why is the test done).
2.  What are the chemicals, proteins, or cells that are being tested (list each)?  Using one sentence briefly describe each thing being tested.
Please be sure to cite your sources that you use for this discussion.  You should have at least 2 sources.  APA citations would be best.  Make sure to put everything in your own words and cite your sources.