Final answer:
Furosemide acts on the ascending loop of Henle in the nephron, inhibiting sodium and chloride ion reabsorption to increase urine output.
Step-by-step explanation:
The parts of the nephron that are the sites of action for furosemide, a diuretic compound, are primarily within the loop of Henle, specifically the ascending loop of Henle. Furosemide works by inhibiting the reabsorption of sodium and chloride ions in this part of the nephron. This action promotes diuresis, leading to increased urine output and decreased water conservation in the body. The site of action for furosemide includes the ascending loop of Henle, the distal convoluted tubule, and the collecting ducts within the nephron.