Download NTRUHS 1st Year MBBS 2022 May Physiology Paper II Question Paper

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DR.NTR UNIVERSITY OF HEALTH SCIENCES: AP: VIJAYAWADA-520 008

MBBS DEGREE EXAMINATION – MAY, 2022

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FIRST M.B.B.S. EXAMINATION

PHYSIOLOGY - PAPER-II (SET-C)

(Multiple Choice Questions)

Time: 20 Minutes Max Marks: 20

Note: Answer all questions

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SECTION - I (MCQs- 20 MARKS) 1x20=20

1. All of the following are true for denervation hypersensitivity EXCEPT
   1. Plasma Noradrenaline level decreases in noradrenergic neuron denervation
   2. Plasma Ach level decreases in cholinergic neuron denervation
   3. Seen in smooth muscles
   4. The Ach receptors appear all over sarcolemma

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2. The density of Na+ channels is maximum at
   1. Soma
   2. Nodes of Ranvier
   3. Dendrite
   4. Surface of myelin

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3. The length of muscle at which it develops maximal isometric active tension is called
   1. Maximum length
   2. Active length
   3. Initial length
   4. Resting length

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4. Action potential
   1. Requires subthreshold stimulus
   2. Does not show All or none phenomenon
   3. Does not show decremental response
   4. Can be summated

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5. Ovulation in a woman with normal health and cycle, occurs at
   1. Just after corpus luteal maturation
   2. During progesterone rise
   3. 14 days prior to start of menstrual bleeding
   4. Just before LH surge

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6. Most distinguishing feature between skeletal muscle and smooth muscle is
   1. Tropomyosin
   2. Myosin
   3. Actin
   4. Troponin

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7. Which of the following is not true about cardiovascular maternal changes in pregnancy
   1. Systolic pressure increases
   2. Heart rate increases
   3. Stroke volume increases

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8. Which of the following is not true about testes
   1. Present in scrotal sac to have temperature less than body temperature
   2. Contraction of dartos muscle elevates testes
   3. Pampiniform plexus of blood vessels have counter current system to maintain temperature of testis
9. Which cell in CNS lay myelin sheath
   1. Stellate cells

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   2. Astrocytes
   3. Basket cells
10. Which of the following is the main hormone for milk synthesis and secretion
    1. Progesterone
    2. Estrogen

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    3. Oxytocin
11. The dorsal root of spinal cord is sensory and ventral root is motor. This is called:
    1. Rexed laminar principle
    2. Weber-Fechner law
    3. Muller's doctrine of nerve energy

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12. Which is the best female contraceptive method after child birth, but desirous of further deliveries
    1. Tubectomy
    2. Diaphragms
    3. Intrauterine Device
    4. Oral Contraceptive Pills

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13. Which of the following is the major neurotransmitter in the nigrostriatal pathway
    1. Noradrenaline
    2. Acetylcholine
    3. Serotonin
    4. Dopamine

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14. Which of the following is the specific nucleus of thalamus
    1. Ventral posterolateral
    2. Midline
    3. Intralaminar
    4. Centro median

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15. Purkinje cells from the cerebellum end on
    1. Cerebral cortex
    2. Extrapyramidal system
    3. Cranial nerve nuclei
    4. Deep cerebellar nuclei

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16. Which of the following is not true about stretch reflex
    1. Also called myotatic reflex
    2. Afferent is Ib fiber
    3. Monosynaptic reflex
    4. A branch of afferent terminates on inhibitory interneuron

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17. The nucleus involved in formation of Papez circuit is
    1. Pulvinar
    2. Anterior nucleus of thalamus
    3. Intralaminar
    4. VPL nucleus

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18. Which of the following is not a component of vestibular apparatus
    1. Utricle
    2. Saccule
    3. Cochlea
    4. Semicircular canal

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19. The processing of short term memory to long term memory is done (consolidation of long term memory occurs) in:
    1. Prefrontal cortex
    2. Hippocampus
    3. Neocortex
    4. Amygdala

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20. All except one are under the control of hypothalamus
    1. Increase in heart rate during exercise
    2. Food intake
    3. Pituitary hormone (hypophyseal) regulation
    4. Temperature regulation

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