Glossary Term
Supernatant
The liquid lying above a liquid, solid or semi-solid residue, which is separated by crystallization, precipitation or centrifugation of a biological sample.
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Glossary Term
The liquid lying above a liquid, solid or semi-solid residue, which is separated by crystallization, precipitation or centrifugation of a biological sample.
Tests
Syphilis tests generally look for certain antibodies in your blood. Antibodies are proteins that your immune system makes when it finds harmful substances in your body. In this case, the harmful substance is the bacterium that causes syphilis , one of the most common sexually transmitted infections (STIs.)
Tests
A testosterone levels test measures the amount of the hormone testosterone in a sample of your blood. Hormones are chemical messengers in your bloodstream that control the actions of certain cells or organs.
Article
Research record from J Clin Lab Anal, 2026-03-18. PMID 41848210.
Article
Research record from Lab Anim, 2026-06-18. PMID 42316777.
Article
Research record from Biomolecules, 2026-10-18. PMID 42939769.
Tests
Therapeutic drug monitoring (TDM) is testing that measures the amount of certain medicines in your blood. It checks whether the amount of medicine you take is safe and effective.
Glossary Term
The lowest limit at which something becomes detectable or relevant.
Tests
A thyroglobulin test measures the amount of a protein called thyroglobulin (Tg) in a sample of your blood. Your thyroid (a small, butterfly-shaped gland in your neck) makes thyroglobulin along with many other important hormones . Together, these hormones control bodily activities such as your heart rate and how fast you burn calories from food.
Tests
A thyroid antibody test measures the level of thyroid antibodies in a sample of your blood to check for an autoimmune thyroid disease . Your thyroid is a small, butterfly-shaped gland in your neck. It makes hormones that control many activities in your body, including your heart rate and how fast you burn calories from food.
Indicators
A hormone synthesized and secreted by the thyroid gland containing four iodine atoms and is converted to triiodothyronine (T3) in the body, influencing metabolism and organ function.
Tests
Thyroxine is also called T4. T4 is a hormone that your thyroid gland makes. A T4 test measures the level of T4 in a sample of your blood. Too much or too little T4 may be a sign of a thyroid problem .