Renal System - Nephrons and Internal Gross Anatomy
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Questions and Answers

What are the structural and functional units of the kidneys?

  • Renal tubules
  • Nephrons (correct)
  • Glomeruli
  • Peritubular capillaries
  • Which structure forms a high-pressure capillary bed in the nephron?

  • Proximal convoluted tubule
  • Nephron loop (loop of Henle)
  • Distal convoluted tubule
  • Glomerulus (correct)
  • What is the main function of the peritubular capillary bed in the nephron?

  • Oxygenation of blood
  • Filtration of blood
  • Secretion of waste products
  • Reabsorption of water and solutes (correct)
  • Which of the following is not a component of the filtrate produced by the nephron?

    <p>Red blood cells</p> Signup and view all the answers

    What is the primary mechanism by which water is carried in the nephron to regulate osmotic equilibrium?

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

    What are the subdivisions of the renal tubule in a nephron?

    <p>Proximal convoluted tubule, Nephron loop, Distal convoluted tubule</p> Signup and view all the answers

    In which part of the renal tubule does water reabsorption become decoupled from solute reabsorption?

    <p>Nephron loop</p> Signup and view all the answers

    Where in the kidney does reabsorption of all the glucose, bicarbonate, amino acids, metabolites, and ⅔ of Na+ occur?

    <p>Proximal convoluted tubule</p> Signup and view all the answers

    Which part of the nephron is responsible for reabsorbing water from the isotonic filtrate and resulting in an increase in salt concentration?

    <p>Descending loop of Henle</p> Signup and view all the answers

    In which segment of the ascending limb of the loop of Henle does Na+ move passively down the concentration gradient?

    <p>Thin segment</p> Signup and view all the answers

    What is the main means of Na+ entry at the apical surface in the thick ascending limb of the loop of Henle?

    <p>Na+-K+-2Cl- symporter</p> Signup and view all the answers

    What plays a vital role in the kidneys’ ability to form dilute or concentrated urine?

    <p>Water reabsorption decoupling</p> Signup and view all the answers

    Which hormone promotes the reabsorption of water from the collecting tubule and duct?

    <p>ADH (vasopressin)</p> Signup and view all the answers

    Which part of the nephron reabsorbs nearly all of the uric acid and about half of the urea, but both are later secreted back into the filtrate?

    <p>Proximal convoluted tubule</p> Signup and view all the answers

    Where in the nephron does water reabsorption become decoupled from solute reabsorption?

    <p>Nephron loop</p> Signup and view all the answers

    In which segment of the ascending limb of the loop of Henle does Na+ move passively down the concentration gradient?

    <p>Thin segment</p> Signup and view all the answers

    Where does reabsorption of water from the isotonic filtrate result in a 3-fold increase in salt concentration?

    <p>Descending loop of Henle</p> Signup and view all the answers

    Which hormone promotes the reabsorption of water from the collecting tubule and duct?

    <p>Antidiuretic hormone (ADH)</p> Signup and view all the answers

    What is the primary mechanism by which Na+ enters the cell in the thick ascending limb of the loop of Henle?

    <p>Active transport</p> Signup and view all the answers

    In which part of the nephron does fine-tuned reabsorption occur based on the body’s needs?

    <p>Collecting Duct</p> Signup and view all the answers

    Which part of the nephron is a diluting region and the site of action of loop diuretics?

    <p>Descending loop of Henle</p> Signup and view all the answers

    Which hormone increases the synthesis of Na+ channels and Na+/K+ ATPase pump in the collecting tubule and duct?

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

    Where does most filtered water and solutes get reabsorbed by the time it reaches?

    <p>Collecting Duct</p> Signup and view all the answers

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