GED Science TestLife ScienceMedium
A client is experiencing persistent fatigue, muscle weakness, and frequent cramps. A blood test reveals an imbalance in electrolytes, specifically low levels of sodium and potassium. Which organ system is primarily responsible for regulating the balance of these electrolytes in the body?
- ADigestive system
- BNervous system
- CUrinary system
- DRespiratory system
Show answer & explanationAnswer & explanation
Correct answer: C. Urinary system
The urinary system, particularly the kidneys, plays a central role in filtering blood and reabsorbing or excreting electrolytes like sodium and potassium to maintain their balance in the body.
Why the other options are wrong
- A. The digestive system absorbs electrolytes from food but isn't the primary regulator of their balance in the blood.
- B. The nervous system coordinates many bodily functions but does not directly regulate electrolyte balance.
- D. The respiratory system regulates blood pH by controlling carbon dioxide levels, not electrolyte balance.
Electrolyte Balance Regulation
The process by which the body maintains stable concentrations of essential ions (electrolytes) like sodium and potassium in body fluids.
- Crucial for nerve and muscle function, and fluid balance.
- Primarily regulated by the kidneys.
- Hormones like aldosterone play a key role.
Memory trick: Your kidneys are the 'master plumbers' of your body, balancing fluids and salts.