Which statement about the nephron is true?

Which statement about the nephron is true?

• A. The nephron stores urine after production.
• B. The nephron is part of the liver.
• C. The nephron is the kidney's functional unit that filters blood, forms urine, and regulates fluid/electrolyte balance.
• D. The nephron is a muscle in the bladder.

Answer: (C)

The nephron is the kidney’s functional unit responsible for filtering blood, forming urine, and regulating fluid and electrolyte balance. Blood is filtered through the glomerulus to create a filtrate, and as that filtrate travels through the tubules, the body reabsorbs most water, electrolytes, and nutrients while wastes and certain substances are secreted into the filtrate. This process concentrates the urine and adjusts its composition, helping control blood volume, electrolyte levels, and acid-base balance. That’s why the statement describing the nephron as the kidney’s functional unit that filters blood, forms urine, and regulates fluid/electrolyte balance is correct. The other statements place the nephron in the wrong organ or assign it a function it doesn’t have—urine storage happens in the bladder, not the nephron; the liver is a different organ; and the bladder muscle is not the nephron.

The nephron is the kidney’s functional unit responsible for filtering blood, forming urine, and regulating fluid and electrolyte balance. Blood is filtered through the glomerulus to create a filtrate, and as that filtrate travels through the tubules, the body reabsorbs most water, electrolytes, and nutrients while wastes and certain substances are secreted into the filtrate. This process concentrates the urine and adjusts its composition, helping control blood volume, electrolyte levels, and acid-base balance.

That’s why the statement describing the nephron as the kidney’s functional unit that filters blood, forms urine, and regulates fluid/electrolyte balance is correct. The other statements place the nephron in the wrong organ or assign it a function it doesn’t have—urine storage happens in the bladder, not the nephron; the liver is a different organ; and the bladder muscle is not the nephron.