Final answer:
Option C. Timed specimens are usually taken to monitor glucose and hormone levels, which are critical in diagnosing diabetes and endocrine disorders.
Step-by-step explanation:
Timed specimens are most frequently collected to monitor glucose levels and hormone levels. These , such as those required for diagnosing diabetes mellitus, involve a fasting period followed by the ingestion of a sugary drink to stimulate the pancreas. The subsequent blood glucose level is then measured to determine pancreatic function. Similarly, monitoring hormone levels over time is crucial in diagnosing and managing endocrine disorders. These tests are essential, for example, when assessing cortisol levels to diagnose conditions like Cushing's syndrome or Addison's disease.
Timed specimens are most frequently collected to monitor hormone levels. Blood samples may be taken at specific intervals to measure the levels of various hormones in the body over a certain period of time. For example, when diagnosing diabetes mellitus, a blood sample is taken after a sugary drink to determine the effect on blood glucose levels. This helps to assess the functioning of the pancreas and the production of insulin.