Download DNB 2017 Dec PHYSIOLOGY PHY Paper III Question Paper

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DECEMBER 2017

PHYSIOLOGY

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PAPER - III

Time : 3 hours

Max. Marks : 100

Important instructions:

• Attempt all questions in order.

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• Each question carries 10 marks.
• Read the question carefully and answer to the point neatly and legibly.
• Do not leave any blank pages between two answers.
• Indicate the question number correctly for the answer in the margin space.
• Answer all the parts of a single question together.

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• Start the answer to a question on a fresh page or leave adequate space between two answers.
• Draw table/diagrams/flowcharts wherever appropriate.

Write short notes on:

1. Draw a labeled diagram of neuro muscular junction in smooth muscle. (3+5+2)

   Molecular basis of smooth muscle contraction.

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   Plasticity in smooth muscles

2. Sensory transduction in: (2+4+2)+2

   a) Mechanoreceptors

   b) Cochlear hair cells

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   c) Taste buds

3. Weber-Fechner Law 2+5+3

4. Define learning and memory: 3+3+4

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   Classification of memory and their neural basis.

   Alzheimer’s disease

5. Draw a schematic diagram to trace the pain pathway 4+6

   Types and qualities of pain

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   Central inhibition of pain

6. What are the association areas of cerebral cortex and where are they located? 4+6

   Functions of various association areas

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7. Draw a schematic diagram of Papez circuit 2+5+3

   What is the role of limbic system in regulation of rage and fear?

8. Enumerate the properties of synapses

   Direct and indirect inhibition of synapses

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   Long term potentiation and depression.

9. a) List the postural reflexes integrated at the level of spinal cord, medulla, midbrain and cortex 4+3+3

   b) Hemisection of spinal cord

   c) Decerebrate rigidity

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10. a) Differentiate between REM and NREM sleep 6+4

    b) Mechanism of alerting response

11. a) Biological rhythms in humans 7+3

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    b) Physiological basis of Jet lag.

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