A pair of Kidneys consists of _ of functional units.
Correct answer: C. Millions
- A. Million
- B. Billion
- C. Millions
- D. Billions
Explanation
Each kidney contains approximately 1 to 1.5 million nephrons, making the total for a pair of kidneys several million nephrons. These are the functional units responsible for filtering blood and maintaining homeostasis.
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About Homeostasis
Homeostasis maintains a stable internal environment through the kidney and urinary system, thermoregulation and excretion. The kidney topics include filtration, selective reabsorption, urine formation and water balance, while thermoregulation involves sweating, vasodilation, vasoconstriction and hormonal control; excretion is different from egestion, which removes undigested food.
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