Hormones and Kidney Functions VPHY 2 LECTURE
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Questions and Answers

What is the primary role of aldosterone in the human body?

  • Promoting Na+ and water retention, and lowering plasma K+ concentration (correct)
  • Regulating body temperature
  • Stimulating the release of insulin
  • Regulating blood glucose levels
  • Which hormone is directly responsible for stimulating the release of aldosterone in response to decreased blood pressure?

  • Renin (correct)
  • Adrenoglomerulotropin
  • ACTH
  • Insulin
  • Which cells in the kidney nephron are primarily targeted by aldosterone to promote Na+ and water retention?

  • Podocytes
  • Mesangial cells
  • Principal cells of the distal tubule and collecting duct (correct)
  • Parietal cells
  • Which of the following is NOT a member of the mineralocorticoid class?

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

    Which of the following factors has only a minor role in regulating aldosterone production?

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

    Atrial natriuretic peptide (ANP) increases pressure in the glomerular capillaries, leading to a decrease in the glomerular filtration rate (GFR).

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

    ANP inhibits renin secretion, thus suppressing the renin-angiotensin-aldosterone system.

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

    A decrease in sodium reabsorption in the distal convoluted tubule and cortical collecting duct of the nephron leads to decreased excretion of sodium and water.

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

    Arginine vasopressin (AVP) primarily functions to promote water retention and vasodilation.

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

    Reduction in aldosterone secretion by the adrenal cortex leads to decreased sodium reabsorption in the distal tubule and cortical collecting duct.

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

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