alleryStart learning →Which three electrolytes does the kidney regulate most closely?
ASodium, chloride and phosphate
BPotassium, chloride and calcium
CSodium, calcium and potassium
DCalcium, magnesium and sodium
Answer & Solution
Correct answer: C. Sodium, calcium and potassium
1. Sodium, calcium and potassium are singled out for the closest regulation.
2. Sodium governs plasma osmolarity and with it blood volume and pressure.
3. Calcium matters for bone health, muscle contraction, hormone secretion and neurotransmitter release.
4. Failure of potassium regulation has serious consequences for nerve conduction, skeletal muscle and above all cardiac rhythm.
_Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 25 "The Urinary System", section 25.10 The Urinary System and Homeostasis_
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