medical MCQs – Page 257

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 Review each marked answer and report any item that may be outdated or unclear.

5121. The following factors increase the cardiac output except______________?
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A. Myocardial contractility

B. Heart rate

C. After load

D. Preload

5122. Function of GABA on CNS is_______________?
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A. Neuronal activation

B. Glial cell inhibition

C. Neuronal inhibition

D. Glial cell activation

5123. Under resting condition the cardiac output is _______ L/ min ?
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A. 2.5

B. 4.25

C. 9.5

D. 5.25
5124. Fastest conducting tissue in human heart _________________?
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A. SA node

B. Purkinje fibers

C. Bundle of His

D. AV node

5125. Normally, the rate of the heart beat in a human is determined by _________________?
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A. All cardiac muscle

B. The sinoatrial node

C. The cervical ganglion

D. The bundle of His

5126. Unmyelinated fibres differ from myelinated fibers in that they ______________?
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A. Have no association of Schwann cells

B. Have to nodes of Ranvier

C. Have increased excitability

D. Have no power of regeneration

5127. In cerebellar disease, all the statements are correct except______________?
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A. There is adiodokokinesia

B. The rombergs sign is positive

C. There is involuntary termor

D. There is pendular knee jerk
5128. Which of the following muscle helps in depressing the mandible ___________?
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A. Lateral pterygoid

B. Temporalis

C. Medial pterygoid

D. Massetor

5129. Primary teeth differ from permanent teeth in following aspects ?
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A. Thickness of enamel and dentin

B. All of the above

C. Pulp chambers are longer

D. Roots are flaring

5130. Mesiodistal width is more than cervico- incisal length of crown in_____________?
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A. Permanent mandibular lateral incisors

B. Permanent central incisors

C. Decidous maxillary central incisors

D. Permanent maxillary canines

5131. In which of the following areas is the alveolar process the thinnest_____________?
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A. Lingual to the mandibular first molar

B. Buccal to the mandibular central incisors

C. Lingual to the maxillary canines

D. Lingual to the maxillary central incisors

5132. A radiograph of 4- years old child reveals no evidence of calcification of mandibular second pre molar. This indicates______________?
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A. Primary second molar extracted to allow mesial drifting of permanent first molar

B. It is too early to make final predication

C. The child may never develop premolars

D. The teeth may develop later
5133. The primary teeth that present the most outstanding morpholgic deviations from permanent teeth are______________?
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A. Central incisors

B. Canines

C. Mandibular first molar

D. Mandibular second molar

5134. Difference between primary and permanent enamel is_______________?
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A. In prism arrangement

B. None of the above

C. No difference in enamel, difference in dentin

D. in mineral content

5135. Which of the following decidous molars bears the greatest resemblance to a premolar _____________?
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A. Mandibular second

B. Maxillary second

C. Mandibular first

D. Maxillary first
5136. How many cusps does the crown of the maxillary first primary molar have ?
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A. 4

B. 5

C. 3

D. 2

5137. Desmodont is another name for_____________?
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A. periodontal ligament

B. Dehiscence

C. The tooth with one wall pocket

D. Tooth with three walled pocket

5138. In normal occlusion , with which grooves / surface of the permanent mandibular first molar does the mesiobuccal cusp of the permanent maxillary first molar occlude______________?
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A. Distobuccal groove

B. Mesial surface

C. Transverse groove

D. Mesiobuccal surface
5139. What is the thickness of the layer of primsless enamel found in primary teeth_____________?
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A. 50?m

B. 75?m

C. 25 ?m

D. 100?m

5140. Eruption date of decidous maxillary 2nd molar is ______________?
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A. 20 months

B. 18 months

C. 28 months

D. 24 months