Urine for Diagnostic Purposes (4.2.1)

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Why is taking a urine sample better than taking a blood sample?
It is easier, quicker, and less invasive.
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What does a pregnancy test detect?
The human embryo produces the hormone hCG- a small glycoprotein which ends up in the female's urine.
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How does a pregnancy test work?
Monoclonal antibodies on test strip- proteins with specific shape- only attach to hCG. Test strip dipped in urine. hCG in urine attaches to antibody with blue bead. hCG-antibody complex moves up strip, sticks to band of fixed enzymes- makes blue line
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What are anabolic steroids?
They mimic the action of steroid hormones, so promote muscle growth. They are relatively small molecules, so can be filtered out of the blood into the nephron during urine formation.
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Describe the test for anabolic steroids.
Sample is vaporised in presence of a gaseous solvent. Then it's passed down a tube lined with an absorption agent. Each substance present dissolves at a different rate in the solvent, then the lining. The lining is analysed to create a chromatogram.
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Other cards in this set

Card 2

Front

What does a pregnancy test detect?

Back

The human embryo produces the hormone hCG- a small glycoprotein which ends up in the female's urine.

Card 3

Front

How does a pregnancy test work?

Back

Preview of the front of card 3

Card 4

Front

What are anabolic steroids?

Back

Preview of the front of card 4

Card 5

Front

Describe the test for anabolic steroids.

Back

Preview of the front of card 5

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