Answer: Uricotelic.
- A Ammonotelic
- B Aminotelic
- C Ureotelic
- D Uricotelic
Correct answer: D. Uricotelic
Explanation: Uricotelic animals (birds, reptiles, insects) excrete uric acid, which requires little water and can be removed as a semi-solid paste, conserving water.
Filtrate flows through four functionally distinct stages of the nephron: Bowman's capsule filters blood, the PCT reabsorbs most useful substances unconditionally, the Loop of Henle builds a concentration gradient via counter-current exchange, the DCT secretes selected substances, and the collecting duct performs the final ADH-controlled water reabsorption.
Concept context
Nitrogenous waste, kidney structure, urine formation in the nephron, and hormonal regulation of excretion.
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