Physiology MCQs

Page No. 6

Lesions within the basal ganglia produce the following signs except_______________?


aHypotonia

✓


bTremor

✖


cHemiballismus

✖


dAthetosis

✖


View Answer Hypotonia

Which of the following is not true for myelinated nerve fibers______________?


aImpulse through myelinated fibers is slower than non- myelinated fibers

✓


bMembrane currents are generated at nodes of Ranvier

✖


cSaltatory conduction of impulses is seen

✖


dLocal anesthesia is effective only when the nerve is not covered by myelin sheath

✖



Tremors are seen in disorder of_________________?


aBasal ganglia

✓


bPain pathway

✖


cPyramidal tract

✖


dParathyroid gland

✖


View Answer Basal ganglia

Unmyelinated fibres differ from myelinated fibers in that they ______________?


aHave increased excitability

✖


bHave to nodes of Ranvier

✓


cHave no power of regeneration

✖


dHave no association of Schwann cells

✖



The Sensory receptors serving the stretch reflex are classified as___________?


aProprioceptors

✓


bNociceptors

✖


cExteroceptors

✖


dChemo receptors

✖


View Answer Proprioceptors

Abdominal visceral pain is transmitted by ________________?


afibers

✖


bfibers

✖


cParasympathetic fibers

✖


dSympathetic fibers

✓


View Answer Sympathetic fibers

Aphasia is most likely associated with a lesion in_______________?


aBroca’s area

✓


bSensory area

✖


cPrimary motor area

✖


dVisual area

✖


View Answer Broca’s area

The term ‘myopia’ refers to ______________?


aNear sightedness

✓


bFar sightedness

✖


cConstriction of the pupil

✖


dDilation of the pupil

✖


View Answer Near sightedness

Neurotransmitter in nigrostrial pathway is_______________?


aDopamine

✓


bGABA

✖


cAcetyl choline

✖


dNor epinephrine

✖


View Answer Dopamine

First change to occur in the distal segment of cut________________?


aMyelin degeneration

✖


bAxonal degeneration

✓


cMitosis of schwann cell

✖


dSprouting

✖


View Answer Axonal degeneration

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