Diuretics and their Actions

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Questions and Answers

Which of the following diuretics act mostly in the proximal renal tubules?

  • osmotic diuretics (correct)
  • loop diuretics
  • thiazide diuretics
  • potassium-sparing diuretics

What is the main site of action of osmotic diuretics in the nephron?

  • collecting ducts
  • loop of Henle
  • proximal renal tubules (correct)
  • distal renal tubules

Which of the following is an example of an osmotic diuretic?

  • furosemide
  • hydrochlorothiazide
  • spironolactone
  • mannitol (correct)

What is the effect of osmotic diuretics on the kidneys?

<p>increase in urine output (A)</p> Signup and view all the answers

Which of the following diuretics are not used for the treatment of idiopathic hypertension?

<p>osmotic diuretics (D)</p> Signup and view all the answers

Which of the following diuretics is not used for the treatment of hypertensive crisis?

<p>mannitol (C)</p> Signup and view all the answers

Which of the following drugs is an osmotic diuretic?

<p>Mannitol (D)</p> Signup and view all the answers

Which of the following is NOT a characteristic adverse effect of thiazide diuretics?

<p>Hyperkalemia (A)</p> Signup and view all the answers

Which of the following diuretics is an inhibitor of carbonic anhydrase?

<p>Acetazoleamide (C)</p> Signup and view all the answers

Which of the following is a potassium-sparing diuretic?

<p>Triamterene (B)</p> Signup and view all the answers

Which of the following diuretics has a steroid structure?

<p>Spironolactone (C)</p> Signup and view all the answers

Which of the following diuretics produces a diuretic effect by improving renal blood flow and glomerular filtration?

<p>Furosemide (C)</p> Signup and view all the answers

What is the mechanism of action of calcium channel blockers in angina pectoris?

<p>Decrease in heart work and dilatation of coronary vessels (A)</p> Signup and view all the answers

Which of the following drugs is used to control ventricular arrhythmias in myocardial infarction?

<p>Lidocaine (B)</p> Signup and view all the answers

Which of the following drugs increases cardiac histiocyte resistance to ischemia?

<p>Trimetazidine (C)</p> Signup and view all the answers

What is the duration of action of hydrochlorothiazide?

<p>4-8 hours (A)</p> Signup and view all the answers

Which of the following diuretics acts mainly on the ascending limb of Henle's loop?

<p>Furosemide (C)</p> Signup and view all the answers

What is the characteristic of furosemide action?

<p>Fast development of effect (C)</p> Signup and view all the answers

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