Physiology MCQs

Page No. 8

The first physiological response to high environmental temperature is_______________?


aSweating


bVasodilatation


cDecrease heat production


dNon- shivering thermogenesis


View Answer Vasodilatation

Sensory receptors for pain are_______________?


aPacinian corpuscles


bEnd organs of Ruffini


cEnd bulbs of Krause


dFree nerve endings


View Answer Free nerve endings

Delta waves of Electroencephalogram have frequency of ______________?


aMore than 14 cycles per second


bBetween 8 and 13 cycles per second


cLess than 3.5 cycles per second


dBetween 4 and 7 cycles per second



The most outer covering of nerve fibres is called as____________?


aNeurolemma


bPerineurium


cAxolemma


dMyelin sheath


View Answer Perineurium

Intention tremor is a feature of _______________?


aLoss of function of Thalamus


bLoss of function of Hypothalamus


cLoss of function of cerebellum


dLoss of function of Basal ganglia



Epicrritic perception of pain occurs at the level of______________?


aThalamus


bArea 3,1,2


cAreas 5,7


dPulvinar


View Answer Area 3,1,2

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


aSubfornical region


bHabenuclear trigone


cArea posterma


dNeurohypophysis


View Answer Habenuclear trigone

Axon hillock is part of the soma of neuron which________________?


aHas dense Nissl grandules


bHas no Nissl granules


cIs at commencement of dendrites


dIs round in shape


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


bIntracellular potassium concentration


cextracellular sodium concentration


dresting membrane potential



Stimulating mechanoreceptors or nociceptors in mouth triggers the_______________?


aJaw opening reflex


bJaw clenching reflex


cJaw gnashing reflex


dNone of the above


View Answer Jaw opening reflex

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