Medical Science 2022 Paper I 50 marks Compulsory Discuss

Q1

(a) Discuss the stomach under the following headings: (i) Peritoneal relations (ii) Blood supply (iii) Lymphatic drainage (15 marks) (b) Discuss the regulation of secretion and physiological functions of growth hormone. (10 marks) (c) Define physiological jaundice of the newborn. What are the predisposing causes and effects of this condition? (10 marks) (d) Discuss in brief the developmental anomalies of the kidney and the ureters. (5 marks) (e) Discuss the physiological functions of placental hormones in pregnancy. (10 marks)

हिंदी में प्रश्न पढ़ें

(a) निम्नलिखित शीर्षकों के अंतर्गत आमाशय का वर्णन कीजिए : (i) पर्दुयाँ संबंध (ii) रक्त आपूर्ति (iii) लसीका जल-निकासी (15) (b) वृद्धि हार्मोन के स्राव-नियमन तथा शारीरक्रियात्मक कार्यों की व्याख्या कीजिए। (10) (c) नवजात में होने वाले शारीरक्रियात्मक कामला को परिभाषित कीजिए। इस अवस्था के प्रवर्तनपूर्व कारकों और उसके प्रभावों के बारे में लिखिए। (10) (d) वृक्क तथा गवीनी की विकासीय असंगतियों की संक्षेप में व्याख्या कीजिए। (5) (e) गर्भावस्था में अपरा से स्रावित होने वाले हार्मोनों के शारीरक्रियात्मक कार्यों की व्याख्या कीजिए। (10)

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Directive word: Discuss

This question asks you to discuss. 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 'discuss' demands a comprehensive, analytical treatment across all five sub-parts. Allocate approximately 30% of time/words to part (a) given its 15 marks, 20% each to parts (b), (c), and (e) at 10 marks each, and 10% to part (d) at 5 marks. Structure with brief introductions for anatomical parts, detailed physiological mechanisms with Indian epidemiological context where relevant, and conclude with clinical significance for each sub-part.

Key points expected

Part (a): Stomach anatomy—lesser/greater omentum relations, coeliac trunk branches (left gastric, splenic, common hepatic), and lymphatic drainage via gastric, hepatic, and splenic nodes to coeliac nodes
Part (b): GH regulation—hypothalamic GHRH and somatostatin control, IGF-1 negative feedback, pulsatile secretion; functions include linear growth via epiphyseal plates, protein anabolism, lipolysis, and diabetogenic effects
Part (c): Physiological jaundice—unconjugated hyperbilirubinemia 2-3 mg/dL peaking day 3-5 due to immature UDP-glucuronyl transferase, predisposed by prematurity, breastfeeding, G6PD deficiency (common in India), hemolysis; effects include kernicterus risk
Part (d): Renal anomalies—horseshoe kidney (fusion), pelvic kidney (ectopia), polycystic kidney disease, double ureter, ureteropelvic junction obstruction, and vesicoureteral reflux
Part (e): Placental hormones—hCG (corpus luteum rescue), hPL (maternal metabolic adaptation), progesterone and estrogen (maintain pregnancy), relaxin (pelvic relaxation), and their integrated endocrine functions

Evaluation rubric

Dimension	Weight	Max marks	Excellent	Average	Poor
Concept correctness	25%	12.5	Demonstrates precise anatomical terminology for (a)—names all four gastric arteries correctly, identifies specific peritoneal ligaments; for (b) accurately describes dual hypothalamic control and IGF-1 feedback; for (c) correctly distinguishes physiological from pathological jaundice with bilirubin values; for (d) classifies anomalies by embryological origin; for (e) correctly identifies hormone sources (syncytiotrophoblast vs cytotrophoblast)	Covers major concepts with minor errors—confuses left gastroepiploic artery origin, oversimplifies GH regulation as only hypothalamic, gives approximate bilirubin values, lists anomalies without embryological basis, mixes up hPL and hCG functions	Significant factual errors—wrong arterial supply to stomach, describes GH as only from posterior pituitary, cannot differentiate physiological from pathological jaundice, confuses kidney and ureter anomalies, fundamental misunderstanding of placental steroidogenesis
Clinical correlation	20%	10	For (a) links lymphatic drainage to gastric cancer spread (Virchow's node, Krukenberg tumor); for (b) connects acromegaly/gigantism and GH deficiency to clinical presentations; for (c) cites Indian prevalence of G6PD deficiency and neonatal jaundice screening programs; for (d) relates horseshoe kidney to Wilms tumor risk and UPJ obstruction to hydronephrosis; for (e) explains pre-eclampsia markers and gestational diabetes pathophysiology	Mentions clinical relevance superficially—notes gastric cancer spread without specific eponyms, lists GH disorders without mechanism, mentions phototherapy for jaundice without indication criteria, notes anomalies are 'clinically significant' without specifics, states hormones 'maintain pregnancy' without elaboration	No clinical application—purely descriptive anatomy, isolated physiology without disease correlation, misses kernicterus entirely, no mention of renal anomaly complications, fails to connect placental hormones to maternal-fetal medicine
Diagram / pathway	20%	10	Includes labeled diagram of stomach with peritoneal relations and arterial arcade for (a); draws clear hypothalamic-pituitary-liver IGF-1 axis for (b); illustrates bilirubin metabolism pathway highlighting neonatal enzyme deficiency for (c); sketches embryological stages of renal ascent and rotation for (d); depicts placental-endocrine-maternal feedback loops for (e)	Mentions diagrams without drawing them, or draws incomplete sketches—stomach outline without vessels, lists hormones in sequence without feedback arrows, describes bilirubin pathway verbally only, notes 'embryological development' without timeline, lists placental hormones in table format	No visual representation attempted; dense text without structural organization; no flowcharts or schematic diagrams where clearly indicated by question content
Differential / staging	15%	7.5	For (c) systematically differentiates physiological jaundice from pathological (hemolytic disease, sepsis, biliary atresia) using onset time, bilirubin trajectory, and risk factors; for (d) classifies renal anomalies by timing of developmental arrest (pronephric, mesonephric, metanephric); implicitly applies staging concepts to GH excess (active vs controlled acromegaly) and gastric cancer (TNM relevance to lymphatic spread)	Briefly contrasts physiological vs pathological jaundice without criteria, lists anomalies without classification system, mentions 'early vs late' GH effects without staging, superficial comparison of conditions	No differential diagnosis attempted; treats all jaundice as uniform, anomalies as random occurrences, misses opportunity to apply clinical staging frameworks where highly relevant
Management / public-health angle	20%	10	For (c) details Indian national guidelines: universal bilirubin screening, phototherapy thresholds, exchange transfusion criteria, and regional variations in G6PD deficiency; for (d) notes antenatal ultrasound screening and postnatal follow-up protocols; for (e) discusses gestational diabetes screening (DIPSI/WHO criteria in India), pre-eclampsia monitoring; for (b) mentions GH replacement therapy and somatostatin analogues; for (a) notes surgical approaches to gastric malignancy	Generic management statements—'phototherapy is used,' 'surgery may be needed,' 'monitor pregnancy' without specific protocols, Indian guidelines, or public health program references	No management or preventive aspects; purely theoretical description without clinical application, misses entirely on public health relevance despite clear opportunities in neonatal jaundice and maternal health

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