Endocrine Pathophysiology Quiz
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Questions and Answers

What is the most common cause of Syndrome of inappropriate antidiuretic hormone (SIADH) secretion?

  • Dysfunction of the posterior pituitary
  • Altered hormone inactivation
  • Ectopic secretion of ADH (correct)
  • Failure of feedback systems
  • How does ADH affect the renal collecting ducts in SIADH?

  • Stimulates sodium reabsorption
  • Inhibits chloride reabsorption
  • Increases their permeability to water (correct)
  • Decreases their permeability to water
  • What characterizes the volume status in nephrogenic form of SIADH?

  • Dehydration
  • Euvolemia (correct)
  • Hypervolemia
  • Hypovolemia
  • Which parameter remains unchanged in the syndrome of inappropriate antidiuretic hormone (SIADH)?

    <p>Total body sodium</p> Signup and view all the answers

    What is a common characteristic of hyponatremia in SIADH?

    <p>Euvolemic hypotonic hyponatremia</p> Signup and view all the answers

    Which gland dysfunction is associated with Syndrome of inappropriate antidiuretic hormone (SIADH)?

    <p>Posterior pituitary dysfunction</p> Signup and view all the answers

    What type of hormonal alteration is observed in Syndrome of inappropriate antidiuretic hormone (SIADH)?

    <p>Hypersecretion of antidiuretic hormone (ADH)</p> Signup and view all the answers

    What is the major characteristic of hyponatremia in the nephrogenic form of SIADH?

    <p>Euvolemic hypotonic hyponatremia</p> Signup and view all the answers

    What type of feedback system failure can lead to Syndrome of inappropriate antidiuretic hormone (SIADH)?

    <p>Diminished feedback sensitivity</p> Signup and view all the answers

    Which of the following is NOT a characteristic of euvolemic hypotonic hyponatremia in SIADH?

    <p>Edema presence</p> Signup and view all the answers

    What is the primary action of antidiuretic hormone (ADH) on renal collecting ducts in SIADH?

    <p>Increase water reabsorption</p> Signup and view all the answers

    Which condition must coexist for the diagnosis of Syndrome of inappropriate antidiuretic hormone (SIADH)?

    <p>Normal renal, adrenal, and thyroid function</p> Signup and view all the answers

    What is the primary cause of Syndrome of inappropriate antidiuretic hormone (SIADH)?

    <p>Ectopic hormone release</p> Signup and view all the answers

    In SIADH, what characterizes the volume status and edema?

    <p>Euvolemia and absence of edema</p> Signup and view all the answers

    What distinguishes nephrogenic form from other forms of SIADH in terms of hyponatremia?

    <p>Increased extracellular fluid</p> Signup and view all the answers

    Which factor is NOT typically altered in patients with Syndrome of inappropriate antidiuretic hormone (SIADH)?

    <p>Total body sodium</p> Signup and view all the answers

    What distinguishes euvolemic hyponatremia in SIADH from other types of hyponatremia?

    <p>Increased total body water</p> Signup and view all the answers

    Which mechanism contributes to the altered hormonal state in Syndrome of inappropriate antidiuretic hormone (SIADH)?

    <p>Target cell dysfunction</p> Signup and view all the answers

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