Download WBUHS MBBS First Year 2019 July Physiology Paper I Question Paper

FirstRanker.com

The West Bengal University of Health Sciences
MBBS 1st Professional Examination, July 2019

--- Content provided by FirstRanker.com ---

Subject: Physiology
Paper: I

Full Marks: 50
Time: 2 ½ hours

Attempt all questions. The figures in the margin indicate full marks.

--- Content provided by​ FirstRanker.com ---

Group A

1. a) What are the different types of chemoreceptors regulating ventilation? How are they stimulated? List the pathways by which increased Pco2 stimulates ventilation. 3+4+5
   or
   b) What are the two determinants of Cardiac Output? What do you understand by preload and afterload as applied to cardiac function? Mention the factors influencing them. What is ejection fraction? 2+4+4+2

Group B

--- Content provided by FirstRanker.com ---

2. Answer any two of the following: 2 X7
   1. Enumerate the muscle proteins. Explain briefly the sliding filament theory of muscle contraction. What is Rigor Mortis? 1+4+2
   2. How is oxygen transported in blood? Explain with a diagram the effect of PO2 on hemoglobin saturation. Comment on the effect of Carbon Monoxide on oxygen binding to hemoglobin. 2+3+2
   3. Draw a flow chart showing different stages of erythropoiesis with diagrammatic representation. Add a note on erythropoietin. 5+2

Group C

--- Content provided by⁠ FirstRanker.com ---

3. Write a brief account on any four: 4X3
   1. Salivary secretion.
   2. Rh incompatibility
   3. Presynaptic inhibition
   4. Pacemaker potential
   5. Gastro-colic reflex

   --- Content provided by‍ FirstRanker.com ---

Group D

4. Give the physiological explanation of the following: 4x3
   1. Hypoproteinemia causes edema.
   2. Tetanus can be demonstrated easily in a skeletal muscles.
   3. pH of urine rises after a heavy meal.

   --- Content provided by⁠ FirstRanker.com ---

   4. Subendocardial region of the left ventricle is specially vulnerable to ischemia.

FirstRanker.com