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.

The different segments of the renal tubule have varying reabsorption capabilities, explains Dr. Carter.

The proximal convoluted tubule is the most active section for reabsorption, returning glucose, amino acids, vitamins, water, urea and various electrolytes back to the bloodstream. The descending portion of the loop of Henle continues water reabsorption, while the ascending portion continues electrolyte reabsorption.

The distal convoluted tubule is active in reabsorbing sodium, chlorine and calcium ions. The passing filtrate empties from the renal tubules into the collecting ducts, where additional electrolytes, water and urea are also reabsorbed.


Is this answer helpful?

Similar Questions

  • Q:

    What is the purpose of tubular reabsorption?

    A:

    Tubular reabsorption allows the body to reclaim any needed materials from the kidneys after glomerular filtration. Glomerular filtration is the process of forcing water, salts, urea and glucose from the blood through a membrane via pressure. Most of the materials filtered by the kidneys are returned to the blood, depending on the body's needs.

    Full Answer >
    Filed Under:
  • 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.

    Full Answer >
    Filed Under:
  • Q:

    What are the two phases of digestion?

    A:

    The two phases of digestion are mechanical digestion and chemical digestion, according to Midlands Technical College. Both phases occur in the mouth, stomach and small intestine, but chemical digestion also occurs in the large intestine.

    Full Answer >
    Filed Under:
  • Q:

    What is the definition of "urinary suppression"?

    A:

    Urinary suppression is a medical condition in which urine production by the kidneys abruptly declines. This condition in where urine production and excretion is less than 500 ml in a 24-hour period is also known as oliguria in the medical profession.

    Full Answer >
    Filed Under:

Explore