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Excretory Products and their Elimination
Osmoregulation in Terrestrial Animals
1 question from 1 paper, each with its answer.
- question
- 1
- paper
- 1
- of Excretory Products and their Elimination
- 1.67%
Concepts tested
- Water conservation on land
All Questions
2004 AIPMT 1 question
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A terrestrial animal must be able to -On land, water is continuously lost by evaporation from the body surface, during breathing and through excretion, and water is not always available.
So the main physiological challenge for a terrestrial animal is to conserve water.
Adaptations include an impermeable body covering (skin with keratin, exoskeleton with wax), internal lungs, excretion of uric acid in birds, reptiles and insects, and production of concentrated urine by the loop of Henle in mammals.
Pumping salts out through the skin or excreting large amounts of water is typical of aquatic animals, not land animals.
So a terrestrial animal must be able to conserve water.