Paper I — Q8
(a) Describe the interrelationship of renal acidosis and secondary hyperparathyroidism in dogs suffering from chronic nephritis…
(a) Describe the interrelationship of renal acidosis and secondary hyperparathyroidism in dogs suffering from chronic nephritis. (15 marks) (b) Describe the pathways for regulation of hormone secretion from adenohypophysis of animals. (15 marks) (c) Describe the various factors which affect the growth of animals. (20 marks)
हिंदी में प्रश्न पढ़ें
(a) पुरानी नेफ्राइटिस बीमारी से पीड़ित कुत्तों में गुर्दे का अम्लताक्ता (रेनल एसिडोसिस) और माध्यमिक अतिपरathyरोइडिज्म (सेकेंडरी हाइपरपैरathyरोइडिज्म) के अंतर्संबंध का वर्णन कीजिए। (15 अंक) (b) पशुओं के एडीनोहाइपोफाइसिस से हार्मोन स्राव के नियमन के लिए मार्गों का वर्णन कीजिए। (15 अंक) (c) पशुओं की वृद्धि को प्रभावित करने वाले विभिन्न कारकों का वर्णन कीजिए। (20 अंक)
Directive word: Describe
This question asks you to describe. The directive word signals the depth of analysis expected, the structure of your answer, and the weight of evidence you must bring.
See our UPSC directive words guide for a full breakdown of how to respond to each command word.
How this answer will be evaluated
Approach
The directive 'describe' requires detailed, systematic exposition of processes and relationships. Allocate approximately 30% time/words to part (a) on renal acidosis-hyperparathyroidism interrelationship, 30% to part (b) on adenohypophysis regulation pathways, and 40% to part (c) on growth factors given its higher mark weightage. Structure with brief introductions for each part, followed by mechanistic details, and conclude with integrated clinical or production relevance across all three sub-parts.
Key points expected
- Part (a): Pathophysiology of chronic nephritis leading to metabolic acidosis; phosphate retention and hypocalcemia; compensatory PTH hypersecretion; bone demineralization (renal osteodystrophy); vicious cycle of acidosis-parathyroid activation
- Part (b): Hypothalamic regulatory factors (releasing and inhibiting hormones); portal hypophyseal blood system; short-loop and long-loop negative feedback mechanisms; ultradian and circadian rhythms; neuroendocrine integration
- Part (c): Genetic factors (breed, sex, individual variability); nutritional factors (energy, protein, minerals, vitamins); environmental factors (temperature, photoperiod, altitude); hormonal regulation (GH, thyroid, insulin, sex steroids); pathological and management factors
- Integration: Comparative aspects across domestic species (canine, bovine, porcine) where relevant to demonstrate applied veterinary knowledge
- Clinical/production significance: Therapeutic implications for part (a), diagnostic relevance for part (b), and economic importance for part (c)
Evaluation rubric
| Dimension | Weight | Max marks | Excellent | Average | Poor |
|---|---|---|---|---|---|
| Demand-directive understanding | 15% | 7.5 | Demonstrates precise understanding that 'describe' requires comprehensive mechanistic exposition for all three parts—detailing the acidosis-PTH feedback loop in (a), the hierarchical neuroendocrine cascade in (b), and multifactorial growth determinants in (c)—without drifting into mere listing or unwarranted evaluation | Provides adequate description for most parts but may confuse 'describe' with 'list' in one sub-part, or provides uneven depth across (a), (b), and (c) | Misinterprets directive by providing only definitions, bullet points without elaboration, or attempts critical evaluation when not asked; significant imbalance across sub-parts |
| Content depth & accuracy | 30% | 15 | For (a): accurately details the phosphate-calcium-PTH axis, metabolic acidosis compensation, and renal osteodystrophy pathogenesis; for (b): correctly distinguishes hypophysiotropic factors, portal circulation, and feedback loops; for (c): comprehensively covers genetic, nutritional, environmental, hormonal, and pathological factors with species-specific nuances | Covers main mechanisms with minor factual errors; may confuse primary with secondary hyperparathyroidism, or miss some hypothalamic factors, or provide generic growth factors without species relevance | Major physiological inaccuracies; conflates adenohypophysis with neurohypophysis regulation; omits critical mechanisms like phosphate retention in (a) or feedback loops in (b); superficial treatment of growth factors |
| Structure & flow | 20% | 10 | Clear tripartite organization with visible demarcation; each part has logical progression—(a) from nephritis → acidosis → PTH response → bone disease; (b) from hypothalamus → portal system → anterior pituitary → target organs → feedback; (c) from intrinsic to extrinsic factors; effective transitions between parts | Generally organized but may lack clear sub-headings; some parts show logical gaps, such as missing the connection between acidosis and bone resorption in (a), or presenting growth factors without categorization | Disorganized or merged parts without demarcation; random presentation of facts; no discernible logical flow within or between sub-parts; appears as disconnected notes |
| Examples / case-law / data | 20% | 10 | For (a): cites specific canine chronic kidney disease studies or Indian veterinary hospital data; for (b): references landmark experiments (e.g., Harris's portal vessel work, Indian studies on buffalo pituitary function); for (c): provides breed-specific growth curves (e.g., Sahiwal vs. Holstein-Friesian), ICAR growth standards, or NDRI research findings | Provides generic species examples without specific data; mentions common breeds or standard physiological values but lacks research citations or Indian institutional references | No examples or data; or irrelevant examples that demonstrate misunderstanding (e.g., using feline data for canine nephritis, or human endocrine studies without species adaptation) |
| Conclusion & analytical edge | 15% | 7.5 | Synthesizes across parts by highlighting the endocrine theme—showing how hormonal dysregulation in (a) and (b) ultimately impacts growth outcomes in (c); offers forward-looking clinical or production insights; may propose integrated therapeutic or management strategies | Provides separate brief conclusions for each part without cross-integration; restates main points without analytical advancement | No conclusion or abrupt ending; conclusion merely repeats question; or provides unwarranted normative recommendations not grounded in the descriptive content |
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