Factors affecting plasma magnesium levels
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Questions and Answers

Which hormone helps in the mobilization of magnesium from bones, leading to an increase in plasma magnesium levels?

  • Glucagon
  • Parathyroid Hormone (PTH) (correct)
  • Insulin
  • Thyroxine
  • In renal failure, what is the main reason for the development of hypermagnesemia?

  • Decreased excretion of magnesium in the urine (correct)
  • Decreased intake of magnesium-rich foods
  • Increased absorption of magnesium from the intestines
  • Excessive secretion of magnesium from sweat glands
  • Following prolonged hyperparathyroidism, why does the plasma magnesium level decrease?

  • Decreased mobilization of magnesium from bones
  • Increased absorption of magnesium from the intestines
  • Increased excretion of magnesium in the urine
  • Depletion of body stores of magnesium (correct)
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