Which of the following statements about potassium handling by the kidney is correct under normal dietary potassium intake?
Show answer and explanation
Correct answer: Freely filtered, mostly reabsorbed proximally, then fine-tuned distally
Potassium is freely filtered at the glomerulus; a large portion is reabsorbed (e.g., proximal tubule), and the distal nephron/collecting duct adjust K⁺ excretion to match dietary intake and maintain balance.
Practice all 20 Renal Filtration and Electrolyte Balance questions
Keep practicing
More Renal Filtration and Electrolyte Balance questions
- Which principle explains why water follows sodium reabsorption along much of the nephron, helping to concentrate urine and regulate volume?
- Which nephron segment is impermeable to water but actively reabsorbs ions, contributing to the counter-current multiplier system and concen…
- Which of the following would most likely decrease glomerular filtration rate (GFR)?
- Under conditions of volume depletion, activation of the renin–angiotensin–aldosterone system (RAAS) will have which effect on the nephron?
- Which function is NOT primarily a role of the kidneys in renal physiology and electrolyte balance?
- Which statement best describes the importance of hormonal control (e.g., ADH, aldosterone) over simple filtration in maintaining long-term…