Renal Physiology: Reabsorption and Secretion
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Questions and Answers

What is the movement of filtered solutes and water from the lumen of the tubules to the plasma fluid compartment called?

  • Active Transport
  • Excretion
  • Reabsorption (correct)
  • Secretion

    • What is the result of increasing the plasma osmolarity during active transport?

  • Water secretion
  • Increased water reabsorption (correct)
  • No change in water reabsorption
  • Decreased water reabsorption

    • Which of the following is NOT a characteristic of passive reabsorption?

  • Solutes are transported from the lumen to the plasma
  • Follows the same processes of active transport, just in reverse
  • Requires energy (correct)
  • Based on differences in osmolarity

    • What is the primary function of regional specialization of the renal tubules?

    <p>To vary transported items and mechanisms</p> Signup and view all the answers

    What determines the rate of excretion of a substance in the urine?

    <p>The rate of excretion is determined by the amount of substance that enters the lumen of the renal tubules and is not reabsorbed</p> Signup and view all the answers

    What is the term for the elimination of solute and water from the body in the form of urine?

    <p>Excretion</p> Signup and view all the answers

    What is the main driving force for the filtering process in the glomerulus?

    <p>Blood pressure as it enters the glomerulus</p> Signup and view all the answers

    What is the term for the fluid inside the nephron?

    <p>Filtrate</p> Signup and view all the answers

    What type of transport occurs in active reabsorption?

    <p>Active transport across one membrane and passive transport across another</p> Signup and view all the answers

    What is the direction of movement in tubular secretion?

    <p>From the blood to the filtrate</p> Signup and view all the answers

    What is the term for the process of removing substances from the body via the kidneys?

    <p>Tubular secretion</p> Signup and view all the answers

    What opposes the outward pressure of blood pressure in the glomerulus?

    <p>All of the above</p> Signup and view all the answers

    What is the primary function of the glomerular filtration barrier in the kidneys?

    <p>To selectively allow the passage of small molecules while restricting larger ones</p> Signup and view all the answers

    What is a possible reason for proteinuria?

    <p>Overload of the filtration system</p> Signup and view all the answers

    Which of the following components of the glomerular filtration barrier is responsible for selectively allowing the passage of small molecules?

    <p>Fenestrated endothelium</p> Signup and view all the answers

    What is the result of damage to the glomerular filtration barrier?

    <p>Proteinuria due to the passage of proteins into the urine</p> Signup and view all the answers

    What is the primary function of the renal tubule epithelium in the nephron?

    <p>To regulate the solute reabsorption in the nephron</p> Signup and view all the answers

    What is the term for the abnormal presence of protein in the urine?

    <p>Proteinuria</p> Signup and view all the answers

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