Which organ is primarily responsible for regulating water balance and ionic equilibrium in the body by filtering blood and producing urine? (K:1)单项选择题
A
a. Liver
B
b. Lungs
C
c. Heart
D
d. Kidneys

Question

Which organ is primarily responsible for regulating water balance and ionic equilibrium in the body by filtering blood and producing urine? (K:1)

BlackTom AI · Accepted Answer

The question asks which organ mainly regulates water balance and ionic equilibrium by filtering blood and forming urine. This points to the organ responsible for filtering waste and maintaining fluid and electrolyte homeostasis.
Option a: Liver. While the liver detoxifies and metabolizes substances, it is not the primary regulator of water balance or ionic equilibrium through urine formation. It does not filter blood to produce urine as its main function. This makes it incorrect in the context of the stated role.
Option b: Lungs. The lungs exchange gases (oxygen and carbon dioxide) and help regulate pH to some extent, but they do not filter blood to produce urine or directly govern long-term water and electrolyte balance. Their primary job is respiration, not urine formation, so this choice is not correct here.
Option c: Heart. The heart pumps blood and supports circulation, which is essential for kidney function indirectly, but it does not filter blood or produce urine itself. Therefore, identifying the heart as the regulator of water balance and ionic equilibrium would be inaccurate.
Option d: Kidneys. Correct choice. The kidneys filter blood, remove waste, concentrate urine, and carefully regulate water, electrolyte (ionic) balance, and pH. They are the primary organs maintaining fluid and electrolyte homeostasis in the body, aligning exactly with the description in the question.

Which organ is primarily responsible for regulating water balance and ionic equilibrium in the body by filtering blood and producing urine? (K:1)单项选择题

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