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50.0 MB (6.4 MB compressed)
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43.2 x 29.0 cm ⏐ 17.0 x 11.4 in (300dpi)
TRACY RUTTER / SCIENCE PHOTO LIBRARY TRACY RUTTER / SCIENCE PHOTO LIBRARY
Blood glucose test. Man about to put blood from his pricked finger onto a blood glucose test strip. This sort of test can help to diagnose diabetes, a metabolic disorder in which unused sugars accumulate in the blood and urine. It is caused because the body either fails to produce the hormone insulin (type I diabetes) or fails to respond to it properly (type II diabetes). In the healthy body, the release of insulin causes glucose in the blood to be converted to starch-like glycogen for storage. Diabetics must control their blood glucose levels through diet, medication and, in some cases, insulin injections.
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