Topics:
Animal Nutrition, Animal Refresher
Properties of Endogenous Urinary Nitrogen
Which of the following is/are true about endogenous urinary nitrogen (EUN):
- EUN is highest for young animal & lowest during hibernation
- EUN reflect the energy metabolism
- The normal value of EUN is 2 mg/kcal of BMR.
- All the above — Correct Answer
Explanation:
Correct Answer: All the above
All three statements about Endogenous Urinary Nitrogen (EUN) are correct. EUN represents the obligatory, irreducible urinary nitrogen losses from normal metabolic processes, independent of dietary protein intake.
Properties of Endogenous Urinary Nitrogen (EUN)
| Property | Detail |
|---|---|
| Highest in young animals | High metabolic rate → more protein turnover |
| Lowest during hibernation | Minimal metabolic activity |
| Reflects energy metabolism | Proportional to basal metabolic rate (BMR) |
| Normal value | ~2 mg N / kcal of BMR |
EUN vs Exogenous Urinary N
- EUN — from protein catabolism in body tissues; constant regardless of protein intake.
- Exogenous urinary N — from absorbed dietary amino acids catabolized for energy.
- True protein digestibility requires EUN correction similar to MFN correction for faecal protein.
Why Other Options Are Wrong
- Each individual statement (a, b, c) is correct — so the answer is All the above, not any single statement alone.
📚 About this Topic — Animal Nutrition
This multiple choice question is from Animal Nutrition, Animal Refresher. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Nutrition to strengthen your preparation.
