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Question
With respect to sea water the body fluid of shark is -------------.
With respect to sea water the body fluid of shark is -------------.
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Solution
The correct option is C Hypertonic
Sharks and rays are the marine fishes. They are cartilagenous fishes.They have osmoregulatory adaptations. This form of modifications allows them to tolerate the salt concentrations of their environment. These animals can accumulate and tolerate high concentrations of urea. Urea is toxic to most of the animals. The tissues of this fishes are adapted to function at concentrations of urea. The high urea concentration makes the body fluids slightly hypertonic to sea water. This results in a net inflow of water. They have well-developed kidneys. The kidneys are capable to excrete a large volume of urine. Excess salt is excreted by the kidneys and, in many species, by a rectal gland. Thus, the correct answer is option C.
Sharks and rays are the marine fishes. They are cartilagenous fishes.They have osmoregulatory adaptations. This form of modifications allows them to tolerate the salt concentrations of their environment. These animals can accumulate and tolerate high concentrations of urea. Urea is toxic to most of the animals. The tissues of this fishes are adapted to function at concentrations of urea. The high urea concentration makes the body fluids slightly hypertonic to sea water. This results in a net inflow of water. They have well-developed kidneys. The kidneys are capable to excrete a large volume of urine. Excess salt is excreted by the kidneys and, in many species, by a rectal gland.
Thus, the correct answer is option C.
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