Final answer:
A single analyte test measures one specific substance, like the blood glucose test. A profile test measures multiple substances, like the complete blood count (CBC).
Step-by-step explanation:
A single analyte test measures one specific substance. An example of this is a blood glucose test that measures the levels of glucose in the blood.
A profile test, on the other hand, measures multiple substances. An example of this is a complete blood count (CBC) which measures the levels of different cells and substances in the blood.