Q:

Where do filtration and reabsorption occur in the kidneys?

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Quick Answer

Filtration occurs in the glomerulus, while the majority of reabsorption occurs in the proximal convoluted tubule of the nephron. The kidneys filter approximately 200 quarts of blood per day, according to the National Kidney and Urologic Diseases Information Clearinghouse.

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Full Answer

The kidneys are responsible for filtering wastes out of the blood and maintaining normal fluid and electrolyte balances. Each kidney has approximately one million filtering units called nephrons, which filter harmful wastes out of the blood. In people with kidney disease, the kidneys do not filter the blood as well as they should. As a result, minerals and waste products build up in the bloodstream, causing fatigue, nausea and other symptoms.

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  • Q:

    What is the name for the functional unit of the kidney?

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    The nephron is the functional unit of the kidney. It is comprised of five different parts that all work together to help the kidney function properly. The main function of the kidney is to filter and clean the blood.

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  • Q:

    What is the ascending loop of Henle?

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    The ascending loop of Henle is a portion of the nephron in the kidney. It connects to the descending loop of Henle and runs through the medulla of the nephron in the kidney. Together, the descending and ascending loops of Henle reabsorb water and ions for the kidney.

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    What is the primary function of the proximal convoluted tubule?

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    The primary function of the proximal convoluted tubule is to reabsorb most of the materials needed from the filtrate as it passes through the kidneys, explains HowStuffWorks. The proximal convoluted tubule reabsorbs approximately 65 percent of sodium and most of the water from the filtrate.

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    What is the function of podocytes?

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    Podocytes are cells in the Bowman's capsule of the kidneys, which wrap around the capillaries of the glomerulus. Long feet-like projections of the podocytes leave filtration slits between the leaky capillaries and Bowman's space, explains Wikipedia. As the Bowman's capsule filters blood, large molecules, such as proteins, are held back and small molecules, such as water, salts and amino acids, move through filtration slits to begin the formation of urine.

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