Mastering Body Fluid Osmolality and Thirst
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Questions and Answers

Which of the following is true about the maintenance of body fluid osmolality?

  • Osmolality is maintained at 200 - 250 mOsm
  • Osmolality is maintained at 280 - 300 mOsm (correct)
  • Osmolality is maintained at 350 - 400 mOsm
  • Osmolality is maintained at 500 - 550 mOsm

    • What happens when there is a decrease in osmolality?

  • Thirst inhibition and ADH release
  • Thirst stimulation and ADH inhibition
  • Thirst inhibition and ADH inhibition
  • Thirst stimulation and ADH release (correct)

    • What is the pathogenesis of hypotonic hydration?

  • ECF osmolality increases, leading to hyponatremia
  • ECF osmolality increases, leading to hypernatremia
  • ECF osmolality decreases, leading to hyponatremia (correct)
  • ECF osmolality remains unchanged, leading to normonatremia

    • What are the etiologies of hypotonic hydration?

    <p>Renal insufficiency and rapid excess water ingestion</p> Signup and view all the answers

    What happens when there is a decrease in water content in the blood?

    <p>ADH release increases and reabsorption of water increases</p> Signup and view all the answers

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