Download MBBS 1st Year 1022 RGUHS MBBS Physiology Paper I RS4 2023 Feb Question Paper

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QP CODE: 1022

Rajiv Gandhi University of Health Sciences, Karnataka

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MBBS Phase- I(CBME) Degree Examination-09-Feb-2023

Time: Three Hours

Max. Marks: 100Marks

PHYSIOLOGY- PAPER-I(RS-4)

Q.P. CODE: 1022

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(QP contains two pages)

Your answers should be specific to the questions asked

Draw neat, labeled diagrams wherever necessary

LONG ESSAYS 2x10=20Marks

1. Discuss the cardiorespiratory changes seen in a person doing moderate isotonic exercise
   

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   Or
2. Define Blood Pressure. List the factors regulating blood pressure. Add a note on long term regulation of blood pressure

2. Explain the mechanism of HCL secretion in gastric juice and discuss the factors regulating it

SHORT ESSAYS 8x5=40 Marks

1. Explain the pressure changes in the lung during normal respiration

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2. Explain the organization of body fluids compartments. Mention one method to measure extra cellular fluid volume and total body water
3. Discuss the factors regulating glomerular filtration
4. A 20-year-old male was brought to the casualty following a road traffic accident. On examination his extremities were found to be cold and clammy, heart rate 102/min and blood pressure 70/50mm of Hg
   a) Explain the physiological basis of cold clammy extremities
   b) Classify shock and state Marey's law

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5. Explain the intrinsic mechanism of coagulation
6. Explain the Bohr effect and Haldane effect
7. Discuss the mechanism of fat digestion and absorption in gastrointestinal tract
8. Describe the buffer systems present in renal tubules

SHORT ANSWERS 10x3=30Marks

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1. Mention the physiological basis of increased ventilation perfusion ratio in apex of lung
2. Classify anaemia on the basis of morphology with examples
3. Mention the causes for the waves of Jugular venous pulse
4. List different layers of respiratory membrane
5. Explain the basis of using phototherapy for physiological jaundice

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6. Explain the basis of megaloblastic anemia seen after gastrectomy
7. Enumerate the function of platelets
8. Explain Laplace law with reference to urinary bladder
9. List the properties of cardiac muscle
10. Explain the mechanism of action of loop diuretics

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Multiple Choice Questions 10x1=10 Marks

1. i) Cephalic phase of gastric juice secretion is controlled mainly by
   A. Neural factors
   B. Hormonal factors
   C. Gastric distension
   

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   D. Presence of proteins in stomach
2. ii) Atrial systole coincides with ventricular
   A. Isometric contraction
   B. Rapid ejection phase
   C. Last rapid filling phase
   

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   D. Isometric relaxation
3. iii) Descending limb of loop of Henle is permeable to all EXCEPT
   A. Water
   B. Sodium
   C. Urea
   

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   D. Glucose
4. iv) PCO2 of alveolar air in mm of Hg
   A. 104
   B. 46
   C. 40
   

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   D. 27
5. v) Maximum velocity of conduction in the cardiac musculature is seen in
   A. SA node
   B. AV node
   C. Bundle of His
   

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   D. Purkinje fibers
6. Edema can develop due to
   A. Decrease in capillary hydrostatic pressure
   B. Increase in interstitial fluid hydrostatic pressure
   C. Decrease in capillary oncotic pressure
   

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   D. Decrease in interstitial fluid colloid osmotic pressure
7. ii) The plasma level at which a substance first appears in urine is
   A. Renal threshold
   B. Renal clearance
   C. Tubular maximum
   

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   D. Filtered load
8. iii) Chief cells of gastric gland secrete
   A. Hydrochloric acid
   B. Mucous
   C. Pepsinogen
   

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   D. Intrinsic factor
9. iv) Decompression sickness is due to
   A. Increased partial pressure of nitrogen in alveolar air
   B. Bubbling of CO2 in tissues
   C. Decreased PO2 in atmospheric air
   

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   D. Nitrogen bubbles in body fluids
10. v) Warfarin acts as an anticoagulant by decreasing
    A. Calcium content in blood
    B. Active form of vitamin K
    C. Thrombin level
    

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    D. Platelet aggregation

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