medical MCQs – Page 368

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 Review each marked answer and report any item that may be outdated or unclear.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

7341. The velocity of conduction in the Purkinjie fibers of the heart is__________________?
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A. 1 to 4 m/sec

B. 5 to 8 m/sec

C. More than 12 m/sec

D. 9 to 12 m/sec

7342. The following factors increase the cardiac output except______________?
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A. Myocardial contractility

B. Preload

C. Heart rate

D. After load

7343. Minimum blood pressure is in_____________?
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A. Capillaries

B. Aorta

C. Arteries

D. Venules

7344. Pacinian corpuscles are major receptor for______________?
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A. Pressure

B. Touch

C. Pain

D. Temperature

7345. Peripheral resistance is maximum in_______________?
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A. Artery

B. Vein

C. Arteriole

D. Aorta

7346. Aphasia is most likely associated with a lesion in_______________?
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A. Primary motor area

B. Brocas area

C. Visual area

D. Sensory area

7347. Glomerular capillary pressure differ from other capillaries of body in______________?
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A. Higher filtration pressure

B. Lower filtration pressure

C. Both of the above

D. None

7348. The Sensory receptors serving the stretch reflex are classified as___________?
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A. Exteroceptors

B. Chemo receptors

C. Nociceptors

D. Proprioceptors

7349. Which of the following is not true for myelinated nerve fibers______________?
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A. Membrane currents are generated at nodes of Ranvier

B. Impulse through myelinated fibers is slower than non- myelinated fibers

C. Local anesthesia is effective only when the nerve is not covered by myelin sheath

D. Saltatory conduction of impulses is seen

7350. Cardiac cycle duration in man is_______________?
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A. 1.2 seconds

B. 0.8 seconds

C. 0.4 seconds

D. 1.6 seconds

7351. Heart muscle, true are all except_______________?
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A. Act as syncytium

B. Has gap junctions

C. Has branching

D. Has multiple nuclei

7352. Effect on force of contraction of heart is_____________?
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A. Ionotropic effect

B. Chronotropic effect

C. Dromotropic effect

D. Bathmotropic

7353. All the heart valves are open during which stage of cardiac cycle __________________?
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A. Systolic ejection

B. None of the above

C. Isovolumetric relaxation

D. Isovolumetric contraction

7354. Which of the following has a ketogenic effect on livers______________?
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A. Androgen

B. Glucagon

C. Insulin

D. GH

7355. Which one of the following human tissues contains the greatest amount of body glycogen ?
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A. Kidney

B. Liver

C. Skeletal muscle

D. Cardiac muscle

7356. Inhibition of glycolysis by O2 is known a_____________?
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A. Gluconeogenesis

B. Pasteur effect

C. Hill reaction

D. Muni effect

7357. A example of a preventive antioxidant is_______________?
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A. Catalase

B. Superoxide dismutase

C. Tocopherol

D. Urate

7358. The main enzyme responsible for activation of xenobiotics in (detoxification)____________?
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A. Cytochrome P-450

B. NADPH cytochrome P-450 reductase

C. Glucuronyl transferase

D. Glutathione S-transferase

7359. In TCA, substrate level phospherylation takes place in______________?
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A. Alpha ketoglutrate to succinyl CoA

B. Oxalocetate to citrate

C. Succinate to fumarate

D. Succinyl CoA to Succinate

7360. The conversion of glucose 6-P to fructose 6-P is an example of which of the following reactions___________?
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A. Dehydration

B. Aldol cleavage

C. Phosphate transfer

D. Isomerisation

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