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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?

increase in urine output (A) Signup and view all the answers

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

osmotic diuretics (D) Signup and view all the answers

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

mannitol (C) Signup and view all the answers

Which of the following drugs is an osmotic diuretic?

Mannitol (D) Signup and view all the answers

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

Hyperkalemia (A) Signup and view all the answers

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

Acetazoleamide (C) Signup and view all the answers

Which of the following is a potassium-sparing diuretic?

Triamterene (B) Signup and view all the answers

Which of the following diuretics has a steroid structure?

Spironolactone (C) Signup and view all the answers

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

Furosemide (C) Signup and view all the answers

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

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

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

Lidocaine (B) Signup and view all the answers

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

Trimetazidine (C) Signup and view all the answers

What is the duration of action of hydrochlorothiazide?

4-8 hours (A) Signup and view all the answers

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