Which of the following organs play(s) the primary role in maintaining fluid and electrolyte balance in the human body?
Kidneys
Water and salts are kept in balance mainly by the renal system.
The kidneys filter plasma, adjust the volume reabsorbed and excrete excess water, sodium, potassium, chloride and hydrogen ions, keeping body fluids and electrolytes within tight limits.
Lungs mainly handle gas exchange, the stomach digests food, and the liver handles metabolism and detoxification — none take the primary role in fluid-electrolyte balance.
Hence, Kidneys.
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Important Questions from Physiology
If a person touches a hot surface and quickly pulls their hand away, which type of nerves are primarily responsible for sending the signal to move the hand?
What is the primary function of the baroreceptors located in the carotid sinus and aortic arch?
During the menstrual cycle, what typically occurs when estrogen and progesterone levels drop at the end of the cycle?
What is the primary function of alveoli in the lungs?
A patient presents with excessive thirst, frequent urination, and fatigue. Laboratory results reveal low levels of antidiuretic hormone. Which endocrine gland is most likely malfunctioning in this scenario?
