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urochrome The normal yellow color of urine is produced by: bilirubin A yellow-brown specimen that produces a yellow foam when shaken can be suspected of containing: melanin, homogentistic acid, methemoglobin A urine that turns black after standing may contain: red blood cells produce a cloudy specimen Specimens that contain intact RBCs can be visually distinguished from those that contain hemoglobin because: viscous and orange (FROM MUCUS/ANTIBIOTICS) Specimens from patients receiving treatment for urinary tract infections frequently appear: amorphous phosphates and carbonatesc Freshly voided normal urine is usually clear; however, if it is alkaline, a white turbidity may be present due to: Amorphous urates Microscopic examination of a clear urine that produces a pink precipitate after refrigeration will show: 1. 030 Which of the following specific gravities would be most likely to correlate with a dark yellow urine: light velocity in air with light velocity in solutions Refractive index compares: distilled water and sodium chloride Refractometers are calibrated using: radiographic dye infusion A correlation exists between a specific gravity of 1.050 and a: adjust the set screw The reading of distilled water by refractometer is 1.003. You should: 1.040 A urine specimen with a specific gravity of 1.008 has been diluted 1:5. The actual specific gravity is: