Functions of Kidneys: Excretion and Regulation
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Questions and Answers

Which of the following is NOT a primary site of elimination by the kidneys?

  • Urea
  • Creatinine
  • Sodium (correct)
  • Bilirubin
  • What is the primary function of renin in the regulation of arterial pressure?

  • Constriction of blood vessels
  • Excretion of metabolic waste
  • Formation of angiotensin 2 (correct)
  • Dilation of blood vessels
  • Which of the following electrolytes is NOT regulated by the kidneys?

  • Potassium
  • Magnesium
  • Sodium
  • Calcium (correct)
  • What is the role of kidneys in regulating acid-base balance?

    <p>Regulation of HCO3-</p> Signup and view all the answers

    Which substance is primarily eliminated by the kidneys as a result of muscle activity?

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

    How does an increase in water intake affect kidney function?

    <p>Increases urine production</p> Signup and view all the answers

    Which part of the kidney is responsible for producing urine?

    <p>Renal medulla</p> Signup and view all the answers

    What is the function of the renal pelvis?

    <p>Releasing urine into the ureter</p> Signup and view all the answers

    Where does the renal vein carry blood from?

    <p>Renal cortex</p> Signup and view all the answers

    What is the role of the minor calyx in the kidney?

    <p>Releasing urine into the ureter</p> Signup and view all the answers

    Which portion of the kidney is covered by a thin connective tissue sheath called the capsule?

    <p>Whole organ</p> Signup and view all the answers

    Where does the renal artery eventually divide into the smallest vessel, the arterioles?

    <p>Interlobular artery</p> Signup and view all the answers

    What is the role of the afferent arteriole in the nephron?

    <p>Carries blood to the glomerulus</p> Signup and view all the answers

    Which part of the kidney extends into the renal medulla?

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

    How many nephrons are there approximately in each kidney?

    <p>1.25 million</p> Signup and view all the answers

    What is the primary function of the peritubular capillaries in the kidney?

    <p>Supplies the renal tissue</p> Signup and view all the answers

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