Answer :
B. Sodium is not a protein in blood plasma.
Blood Plasma:
Plasma is separated from blood by spinning a tube of fresh blood containing anticoagulant in a centrifuge until the blood cells fall to the bottom of the tube. The plasma is then poured out or aspirated. For point-of-care testing applications, plasma can be extracted from whole blood by filtration or agglutination to allow rapid testing for specific biomarkers. Plasma has a density of approximately 1,025 kg/m3 (1.025 g/mL). Serum is blood plasma that does not contain clotting factors. Plasmapheresis is a medical therapy that involves the collection, treatment, and reuptake of plasma.
- Sodium:
Sodium is a chemical element with symbol Na (from Latin sodium) and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is an alkali metal and belongs to group 1 of the periodic table. Its only stable isotope is 23Na. Free metals do not exist in nature and must be made from compounds. Sodium is the sixth most abundant element in the earth's crust and is found in numerous minerals such as feldspar, sodalite, and halite (NaCl). Many sodium salts are highly water soluble: over time sodium ions have been leached from the earth's minerals by the action of water.
Proteins in human blood plasma include albumin, globulin, and fibrinogen. Albumin helps to regulate osmotic pressure, globulin helps with immune responses, and fibrinogen helps with blood clotting.
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