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Which one of the following statements is correct with respect to salt water balance inside the body of living organisms?

  1. A
    when water is not available camels do not produce urine but store urea in tissues
  2. B
    Salmon fish excretes lot of stored salt through gill membrane when in fresh water.
  3. C
    Paramecium discharges concentrated salt solution by contractile vacuoles
  4. D
    The body fluids of fresh water animals are generally hypotonic to surrounding water.

Solution & Step-by-step Explanation

Camels possess remarkable adaptations to dehydration. When water is scarce, they can significantly reduce urine production and tolerate high concentrations of urea in their blood and tissues. They also allow their body temperature to fluctuate to reduce water loss through sweating. Fresh water animals typically have body fluids hypertonic (not hypotonic) to their surroundings.

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Which one of the following statements is correct with respect to salt water balance inside the body of living organisms?
A
when water is not available camels do not produce urine but store urea in tissues
B
Salmon fish excretes lot of stored salt through gill membrane when in fresh water.
C
Paramecium discharges concentrated salt solution by contractile vacuoles
D
The body fluids of fresh water animals are generally hypotonic to surrounding water.

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