Mastering Nitrogenous Waste Excretion
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Questions and Answers

Which of the following is NOT a nitrogenous waste excreted by animals?

  • Ammonia
  • Carbon dioxide (correct)
  • Urea
  • Uric acid
  • Which of the following is NOT a common excretory organ in animals?

  • Malpighian tubules
  • Gills (correct)
  • Nephridia
  • Protonephridia
  • What is the functional unit of the kidney?

  • Bowman's capsule
  • Glomerulus
  • Renal tubule
  • Nephron (correct)
  • Which part of the nephron is responsible for filtration?

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

    How much blood is filtered by the glomerulus per minute?

    <p>1200 ml</p> Signup and view all the answers

    What is the role of JGA in the excretory system?

    <p>Regulation of GFR</p> Signup and view all the answers

    What is the role of the renal tubule in urine formation?

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

    What is the role of the proximal convoluted tubule in the nephron?

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

    What is the role of the distal convoluted tubule in the nephron?

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

    What is the role of the collecting duct in the nephron?

    <p>Transport of urine</p> Signup and view all the answers

    Where does the majority of reabsorption and selective secretion take place?

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

    What is the function of the loop of Henle?

    <p>Maintain osmolar gradient</p> Signup and view all the answers

    Which substances could be secreted into the filtrate by the tubules?

    <p>NH3 and urea</p> Signup and view all the answers

    What is the function of the vasa recta?

    <p>Reabsorb water and electrolytes</p> Signup and view all the answers

    What is the function of the distal convoluted tubule (DCT) and collecting duct?

    <p>Reabsorb water and electrolytes</p> Signup and view all the answers

    What happens to the filtrate as it moves down the descending limb of the loop of Henle?

    <p>It gets concentrated</p> Signup and view all the answers

    What happens to the filtrate as it moves up the ascending limb of the loop of Henle?

    <p>It gets diluted</p> Signup and view all the answers

    What is the purpose of the counter current mechanism between the loop of Henle and vasa recta?

    <p>Maintain osmolar gradient</p> Signup and view all the answers

    What is the function of the urinary bladder?

    <p>Store urine</p> Signup and view all the answers

    Which organs assist in excretion?

    <p>Skin, lungs, and liver</p> Signup and view all the answers

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