medical MCQs – Page 256

Practise multiple-choice questions from medical for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

medical Mcqs

1. oral anatomy 2. microbiology 3. oral pathology and medicine 4. physiology 5. biochemistry 6. general anatomy 7. dental materials 8. pharmacology 9. pathology 10. oral histology

5101. Ventricular muscle receives impulses directly from the_______________?
0

A. Bundle of HIS

B. Purkinje system

C. Right and left bundle branches

D. AV node

5102. Gag reflex is mediated by _______ cranial nerve ?
0

A. X

B. XII

C. IX

D. VII

5103. Lesions within the basal ganglia produce the following signs except_______________?
0

A. Hemiballismus

B. Athetosis

C. Tremor

D. Hypotonia

5104. Breathing ceases upon destruction of the___________________________?
0

A. Cerebrum

B. Cerebellum

C. Medulla oblongata

D. Hypothalamus

5105. Centre of activity of autonomic nervous system is_________________?
0

A. Midbrain

B. Cerebrum

C. Hypothalamus

D. Pons

5106. Conduction velocity is least in_______________?
0

A. AV node

B. SA node

C. SA node

D. Purkinje fibers

5107. Cardiac output is a measure of______________?
0

A. Peripheral resistance X tissue fluid

B. Peripheral resistance X cardiac rate

C. Blood pressure X cardiac rate

D. Heart rate X blood volume

5108. Stimulating mechanoreceptors or nociceptors in mouth triggers the_______________?
0

A. Jaw clenching reflex

B. Jaw gnashing reflex

C. None of the above

D. Jaw opening reflex

5109. Hyper kinetic syndromes such as chorea and athetosis are usually associated with pathological changes in_______________?
0

A. Pathways for recurrent collateral inhibition in the spinal cord

B. Anterior hypothalamus

C. Motor areas of cerebral cortex

D. Basal ganglia complex

5110. All the heart valves are open during which stage of cardiac cycle __________________?
0

A. None of the above

B. Systolic ejection

C. Isovolumetric contraction

D. Isovolumetric relaxation

5111. Receptors for olfactory sensation are present in ______________?
0

A. Lateral walls

B. None of the above

C. Lateral wall and nasal septum above superior concha

D. Nasal septum

5112. Cell bodies of the neurons which carry taste sensation from the anterior 2/3rd of the tongue are located in________________?
0

A. Superior cervical ganglion

B. Trigeminal nerve ganglion

C. Geniculate ganglion

D. Otic ganglion

5113. Tremors are seen in disorder of_________________?
0

A. Basal ganglia

B. Pyramidal tract

C. Parathyroid gland

D. Pain pathway

5114. First change to occur after nerve cut is_______________?
0

A. Myelin sheath degeneration

B. Axonal sprouting

C. Nuclear disintegration

D. Schwan cell mitosis

5115. The most outer covering of nerve fibres is called as____________?
0

A. Axolemma

B. Perineurium

C. Neurolemma

D. Myelin sheath

5116. Body temperature is maintained by ______________?
0

A. all of the above

B. Peripheral vasoconstriction

C. Covering of the body

D. Postural position

5117. Increased functional demand on the heart produces increased size of the myocardium by _______________?
0

A. Fatty infiltration

B. Hypertrophy

C. Increased amounts of fibrous connective tissue

D. Hyperplasia

5118. DOPA and 5 Hydroxytryptophan are clinically important because______________?
0

A. They are metabolites of various neurogentic amines .

B. They are acidic precursors of Brain amines

C. They cross Blood Brain Barriers

D. They act as neuromodulators

5119. Copious flow of watery saliva is secreted in response to _____________?
0

A. Parasympathetic stimulation

B. CNS stimulation

C. sensory stimulation

D. Sympathetic stimulation

5120. Resting membrane potential of nerve fiber is_______________?
0

A. -70 mv

B. -90 mv

C. + 35 mv

D. -55 mv

Previous Next

Showing 5101 to 5120 of 10266 mcqs