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