GED Science TestLife ScienceMedium
A patient is experiencing severe muscle cramps, weakness, and an irregular heartbeat. Blood tests reveal an abnormally low level of potassium. Which organ system is primarily responsible for regulating the balance of electrolytes like potassium in the body?
- AUrinary system
- BNervous system
- CEndocrine system
- DCardiovascular system
Show answer & explanationAnswer & explanation
Correct answer: A. Urinary system
The urinary system, primarily through the kidneys, plays a crucial role in maintaining electrolyte balance, including potassium, by filtering blood and regulating the excretion or reabsorption of various substances. Imbalances can lead to symptoms like muscle cramps and irregular heartbeat.
Why the other options are wrong
- B. The nervous system coordinates body functions but isn't the main regulator of electrolyte levels.
- C. The endocrine system produces hormones, some of which influence electrolyte balance, but the urinary system is the primary effector.
- D. The cardiovascular system circulates blood but doesn't primarily regulate electrolyte balance.
Electrolyte Balance Regulation
The process by which the body maintains the appropriate concentrations of ions (electrolytes) like sodium, potassium, and calcium, essential for various physiological functions.
- Kidneys are central to electrolyte balance.
- Electrolytes are crucial for nerve and muscle function.
- Imbalances can lead to severe health issues.
Memory trick: Homeostasis: Keeping everything stable, even electrolytes, thanks to the Urinary system's filter.