BIO Lecture Notes - Lecture 1: Blood Proteins, Hypoxanthine, Xanthine
20 Oct 2022
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Plasma is the clear, straw-coloured fluid (with dissolved solid substances) portion of the blood minus its cellular elements. It constitutes about 55% of the blood volume. Water is the main constituent of plasma forming 91% of it. The solid constituents of plasma are given below: Their normal value ranges from 6. 4 to 8. 3 g/dl. Other organic molecules which form 1% of the solids include the following: Non-protein nitrogenous (npn) substances (28 40 mg/dl) ammonia (traces), amino acids, creatine (1 2 mg/dl), creatinine (0. 6 1. 2 mg/dl), xanthine (traces), hypoxanthine (traces), urea (20 40 mg/dl) and uric acid (2 4 mg/dl). Which constitute 1% of the solids in plasma. Include sodium, potassium, calcium, magnesium, chloride, iodide, iron, phosphates and copper. Plasma from which fibrinogen and clotting factors (ii, v and viii) have been removed is called serum. Serum is formed when the blood is allowed to clot in a test tube and the clot is retracted.
