Which one is not a nitrogen waste?
Correct answer: B. Xanthophyll
- A. Hypoxanthine
- B. Xanthophyll
- C. Adenine
- D. Allantoin
- E. Citrulline
Explanation
Xanthophyll is a type of carotenoid pigment. Carotenoids are pigments that give fruits and vegetables their yellow, orange, and red colors. Xanthophyll does not contain nitrogen, so it is not a nitrogenous waste.
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About Homeostasis
Homeostasis maintains a stable internal environment through the kidney and urinary system, thermoregulation and excretion. The kidney topics include filtration, selective reabsorption, urine formation and water balance, while thermoregulation involves sweating, vasodilation, vasoconstriction and hormonal control; excretion is different from egestion, which removes undigested food.
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