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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 Signup and view all the answers

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

osmotic diuretics Signup and view all the answers

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

mannitol Signup and view all the answers

Which of the following drugs is an osmotic diuretic?

Mannitol Signup and view all the answers

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

Hyperkalemia Signup and view all the answers

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

Acetazoleamide Signup and view all the answers

Which of the following is a potassium-sparing diuretic?

Triamterene Signup and view all the answers

Which of the following diuretics has a steroid structure?

Spironolactone Signup and view all the answers

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

Furosemide 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 Signup and view all the answers

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

Lidocaine Signup and view all the answers

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

Trimetazidine Signup and view all the answers

What is the duration of action of hydrochlorothiazide?

4-8 hours Signup and view all the answers

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