Millions of people take drugs called statins to lower serum cholesterol levels. In a small percentage of

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Millions of people take drugs called statins to lower serum cholesterol levels. In a small percentage of people taking these drugs, muscle pain, termed myopathy, is an adverse effect. In a small percentage of these individuals, the condition progresses to rhabdomyolysis, in which the sarcolemma breaks down.
a. Describe the structure and state the function of the sarcolemma.
b. Physicians can measure a patient's levels of creatine phosphokinase to track the safety of using a statin. Enzyme levels that exceed 10 times normal indicate possible rhabdomyolysis. Explain what this elevated enzyme level indicates about the physiology of the muscle cell.
c. Explain why a dusky, dark color in the urine, resulting from the presence of myoglobin, also indicates muscle breakdown.
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Holes Human Anatomy and Physiology

ISBN: 978-0078024290

14th edition

Authors: David Shier, Jackie Butler, Ricki Lewis

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