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The main site of secretion of all substances, except for one, is the proximal convoluted tubule. What is the one substance that is secreted elsewhere? sodium O protein potassium calcium​

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Calcium is one substance that is secreted elsewhere but not in the proximal convoluted tubule.

Renal reabsorption and secretion

Renal reabsorption is defined as the movement of water and specific solutes from the renal tubule back into the plasma.

Renal secretion is defined as the process by which waste ions and hydrogen ions pass from the renal capillaries into the renal tubule to be excreted into the urine.

At the proximal convoluted tubule, calcium is reabsorbed but not secreted. Therefore, Calcium is one substance that is secreted elsewhere but not in the proximal convoluted tubule.

Learn more about renal tubule here:

https://brainly.com/question/26062461

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