| Questions>Karnataka >2003>Physiology |
1] During regeneration after axonotmesis , the usual delay before the start of growth of axons in the distal direction is about :
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2 days
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10days
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3 weeks
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2 months
Ans: B
2] Intra pulmonary shunting refers to:
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anatomical dead space
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alveolar dead space
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Wasted ventilation
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Perfusion in excess of ventilation
Ans: D
3] The need to vitamin B12 & folic acid in the formation of RBC's is primarily to effect on :
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Synthesis & release of erythropoietin from the kidneys
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Absorption of Iron from GUT
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DNA synthesis in the bone marrow
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Hemoglobin formation in the RBC's.
Ans: C
4] The metabolic function of parathormone includes all these except :
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Mobilizes calcium from bone.
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Decreases renal tubular reabsorption of calcium
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Promotes renal production of 1,25 hydroxy cholecalciferol
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Lowers serum phosphate level
Ans: B
5] The functional residual capacity of lung is defined as:
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Tidal volume & residual Volume
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Tidal Volume & expiratory reserve volume
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Inspiratory reserve volume & tidal volume
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Residual volume & expiratory reserve volume
Ans: D
6] Calcium enters the cardiac cell during:
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Rapid upstroke of the action potential
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Down slope of the action potential
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Plateau phase of the action potential
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Slow diastolic depolarization {phase 4} of the action potential .
Ans: C
7] Surfactant is a substance that :
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Is produced in the liver of new borns
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Is important in the new borns but is of little importance in adults.
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Is produced in the basement membrane of lungs
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Helps in prevention of collapse of the alveoli
Ans: D
8] In Wallarian degeneration of a peripheral nerve :
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The axons regenerate at a rate of 1 cm / day.
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Occurs in the distal portion of the broken axon leaving an empty tubule
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Is a feature of neuropraxia
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All the above
Ans: B
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