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Medical Mcqs

Gag reflex is mediated by _______ cranial nerve ?

  • (A)  VII
  • (B)  IX
  • (C)  X
  • (D)  XII
Submitted By :Ali Uppal


Sympathetic stimulation causes ______________?

  • (A)  Arteriolar constriction
  • (B)  Ciliary muscle contraction
  • (C)  Sweat secretion
  • (D)  All of the above
Submitted By :Ali Uppal


Resting membrane potential of nerve fiber is_______________?

  • (A)  -70 mv
  • (B)  -90 mv
  • (C)  -55 mv
  • (D)  + 35 mv
Submitted By :Ali Uppal


Pain sensation from the lateral extremities is transmitted by________________?

  • (A)  Spino thalmamic tract
  • (B)  Dorsal column
  • (C)  Corticospinal tract
  • (D)  Spinocerebellar tract
Submitted By :Ali Uppal


Respiratory center is situated in_______________?

  • (A)  Medulla oblongata
  • (B)  Spinal cord
  • (C)  Midbrain
  • (D)  Hypothalamus
Submitted By :Ali Uppal


Preganglionic parasympathetic fibers are_______________?

  • (A)  Somatic only
  • (B)  Parasympathetic
  • (C)  Sympathetic
  • (D)  Cholinergic
Submitted By :Ali Uppal


Sensations of pain from teeth and temperature are carried by_______________?

  • (A)  Corticospinal tract
  • (B)  Corticobulbar tract
  • (C)  Lateral spinothalamic tract
  • (D)  Ventral spinothalamic tract
Submitted By :Ali Uppal


Lesions within the basal ganglia produce the following signs except_______________?

  • (A)  Hypotonia
  • (B)  Tremor
  • (C)  Hemiballismus
  • (D)  Athetosis
Submitted By :Ali Uppal


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

  • (A)  Impulse through myelinated fibers is slower than non- myelinated fibers
  • (B)  Membrane currents are generated at nodes of Ranvier
  • (C)  Saltatory conduction of impulses is seen
  • (D)  Local anesthesia is effective only when the nerve is not covered by myelin sheath
Submitted By :Ali Uppal


Tremors are seen in disorder of_________________?

  • (A)  Basal ganglia
  • (B)  Pain pathway
  • (C)  Pyramidal tract
  • (D)  Parathyroid gland
Submitted By :Ali Uppal