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Question

The reabsorption of water in the urinary tract takes place with the help of loop of Henle. How is this structure modified in fresh water aquatic species as compared to terrestrial one?

A
Absent
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B
Longer
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C
Shorter
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D
Withered
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E
Thinner
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Solution

The correct option is B Shorter
Since water is never a limiting factor for aquatic animals, they do not need a long loop of Henle to have effecient water reabsorption system. Hence, they have the shorter loop. On the other hand, terrestrial animals need to prevent water loss in the form of urine so they have the longer loop of Henle. This makes option C correct answer.

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