Physiology MCQs

Page No. 8

The first physiological response to high environmental temperature is_______________?


aSweating

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bVasodilatation

✓


cDecrease heat production

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dNon- shivering thermogenesis

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View Answer Vasodilatation

Sensory receptors for pain are_______________?


aPacinian corpuscles

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bEnd organs of Ruffini

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cEnd bulbs of Krause

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dFree nerve endings

✓


View Answer Free nerve endings

Delta waves of Electroencephalogram have frequency of ______________?


aMore than 14 cycles per second

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bBetween 8 and 13 cycles per second

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cLess than 3.5 cycles per second

✓


dBetween 4 and 7 cycles per second

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The most outer covering of nerve fibres is called as____________?


aNeurolemma

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bPerineurium

✓


cAxolemma

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dMyelin sheath

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View Answer Perineurium

Intention tremor is a feature of _______________?


aLoss of function of Thalamus

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bLoss of function of Hypothalamus

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cLoss of function of cerebellum

✓


dLoss of function of Basal ganglia

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Epicrritic perception of pain occurs at the level of______________?


aThalamus

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bArea 3,1,2

✓


cAreas 5,7

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dPulvinar

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View Answer Area 3,1,2

Blood brain barriers is absent in all of the following areas except__________________?


aSubfornical region

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bHabenuclear trigone

✓


cArea posterma

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dNeurohypophysis

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View Answer Habenuclear trigone

Axon hillock is part of the soma of neuron which________________?


aHas dense Nissl grandules

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bHas no Nissl granules

✓


cIs at commencement of dendrites

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dIs round in shape

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View Answer Has no Nissl granules

In nerve , the magnitude of the action potential overshoot is normally a function of the______________?


aMagnitude of the stimulus

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bIntracellular potassium concentration

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cextracellular sodium concentration

✓


dresting membrane potential

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Stimulating mechanoreceptors or nociceptors in mouth triggers the_______________?


aJaw opening reflex

✓


bJaw clenching reflex

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cJaw gnashing reflex

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dNone of the above

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View Answer Jaw opening reflex

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