Which laboratory specializes in tests associated with gray tubes?

The correct choice is associated with Clinical Chemistry due to the specific tests that utilize gray top tubes. These tubes typically contain a glycolytic inhibitor, such as sodium fluoride, and are primarily used for collecting samples that need to prevent glucose metabolism in the specimen. This makes gray tubes ideal for glucose testing and lactate measurements.

Clinical chemistry laboratories focus on the analysis of bodily fluids, particularly blood, to measure substances like glucose, electrolytes, hormones, enzymes, and other metabolites. The use of gray tubes is specifically designed to preserve the integrity of glucose levels, ensuring accurate results for metabolic assessments.

In contrast, hematology focuses on blood cell counts and related disorders, microbiology deals with the detection of pathogens in specimens, and immunology examines immune system responses and diseases. Thus, these specialties do not typically utilize gray tubes for their routine testing protocols as clinical chemistry does.