In a marine environment, the ion secreted by the kidney is:
Correct answer: C. Mg2+
- A. Na+
- B. K+
- C. Mg2+
- D. Cl-
Explanation
In marine organisms, kidneys (or analogous excretory organs) help eliminate excess magnesium ions (Mg²⁺) from seawater intake to maintain ionic balance.
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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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More Homeostasis questions
The mechanism by which substances are removed from blood and are directly added to the tubular fluids is called:
Capillaries present around the loop of Henle:
ADH, which actively transports water from the filtrate in collecting tubules back to the kidney is released by:
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Water and sodium ions are reabsorbed in:
Urea cycle helps in the the detoxification of: