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Thursday, January 7, 2016

Dr. MGR University Question Paper,Paper IV – PHYSIOLOGY INCLUDING BIOPHYSICS – II,FIRST M.B.B.S.,2014 Question Paper

Dr. MGR University Question Paper
FIRST M.B.B.S. DEGREE EXAMINATION
Paper IV – PHYSIOLOGY INCLUDING BIOPHYSICS – II
Q. P. Code : 524054
Time : 180 Minutes Maximum: 50 Marks
Answer ALL questions.
Draw Suitable diagrams wherever necessary
I. Elaborate on: (2 x 7.5 = 15)
 1. Define the terms Cardiac output and Total Peripheral resistance and discuss their
 determinants.
 2. What are the neural mechanisms involved in spontaneous breathing.
 Discuss chemical regulation of respiration.
 Distinguish between the two types of respiratory failure.
II. Write notes on: (10 x 2.5 = 25)
 1. Describe the 3 bipolar limb leads of ECG.
 What is the significance of (a) PR interval (b) ST segment in an ECG?
 2. Discuss the changes in ventricular volume during different phases of the cardiac cycle
with a diagram.
 3. Discuss any two pulmonary function tests which can detect obstructive lung disease.
 4. Trace the pathway for perception of fine touch
 5. Operant conditioning
 6. Clinical features of cerebellar lesions
 7. Define muscle tone and discuss the phenomenon responsible for it.
What conditions lead to alterations of tone?
 8. Endogenous opioid peptides
 9. Refractory errors of the eye
 10. Discuss the phenomena by which sound waves in air induce action potentials in the
cochlear nerve.
III. Short Answers on: (10 x 1 = 10)
1. List the types of shock
2. Define Preload and state its effect on cardiac function
3. Baroreceptor reflex
4. What is myocardial infarction? State one ECG change in this condition.
5. Role of myelin sheath in conduction of nerve impulse
6. Conditions where Plantar response is ‘extensor’
7. Finding in Weber’s test in conduction deafness of the left side
8. Muscle actions responsible for (a) normal expiration (b) forced expiration
9. Oxygen carrying capacity of blood
 10. Hypoxic vasoconstriction – where does it occur and what are its complications?
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