Creatinine has a renal clearance of 140 mL/min due to the fact that
A. it is absorbed by the loop of Henle.
B. it is secreted by the glomerulus.
C. it is absorbed by the renal tubules.
D. it is secreted by the renal tubules.
E. it is produced in the pulmonary tissue.
Answer: C. it is absorbed by the renal tubules.
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Which of the following regions of a sarcomere contain thin filaments?
a) I band b) A band c) H zone d) Both I band and A band. e) All of these answer choices are correct.
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A. wide B. narrow
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