Q:

Where do filtration and reabsorption occur in the kidneys?

A:

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.

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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Related Questions

  • Q:

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

    A:

    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 primary function of the proximal convoluted tubule?

    A:

    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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  • Q:

    What is the function of podocytes?

    A:

    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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  • Q:

    What is the primary site of tubular reabsorption?

    A:

    Tubular reabsorption occurs along the renal tubules of the kidneys, explains Dr. Perry Carter of Midlands Technical College. A renal tubule consists of a proximal convoluted tubule, the loop of Henle and distal convoluted tubule. Filtrate from the renal corpuscle drains into the proximal convoluted tubule, where reabsorption immediately begins.

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