Final answer:
A medical biosensor example is the breath test, which uses biomarkers in exhaled breath to diagnose diseases like asthma and lung cancer.
Step-by-step explanation:
An example of a medical biosensor is the breath test. Scientists have discovered that molecules in our exhaled breath can serve as biomarkers for various diseases, including asthma and lung cancer. By inhaling or ingesting a sensor substance and then breathing into a detector, medical professionals can diagnose these diseases based on the biomarkers present in the patient's breath.