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    Tracing a Molecule through the Excetory System

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    Trace the pathway of a creatinine molecule from a glomerulus to the urethra. Name every microscopic and gross anatomical structure it passes along the way.

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    Solution Preview

    To start, I suggest you thoroughly review the anatomy and physiology part of your text that deals with the urinary system. Get out the illustrations and follow along.

    I am assuming the creatinine molecule is in the blood and will not be reabsorbed. It is not normal for large molecules or blood products to find themselves in the urine. This would be a sign of kidney malfunction. But we will assume that it is the journey for this molecule.

    The glomerulus, surrounded by Bowman's capsule, filters the blood from the renal ...

    Solution Summary

    The solution traces the path a molecule takes as it moves through the excretory system.