DR.NTR UNIVERSITY OF HEALTH SCIENCES: AP: VIJAYAWADA-520 008
MBBS DEGREE EXAMINATION – MAY, 2022
FIRST M.B.B.S. EXAMINATION
PHYSIOLOGY – PAPER-II (SET-C)
(Multiple Choice Questions)
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Time: 20 Minutes
Max Marks: 20
Note: Answer all questions
SECTION – I (MCQs- 20 MARKS) 1x20=20
- All of the following are true for denervation hypersensitivity EXCEPT
- Plasma Noradrenaline level decreases in noradrenergic neuron denervation
- Plasma Ach level decreases in cholinergi neuron denervation
- Seen in smooth muscles
- The Ach receptors appear all over sarcolemma
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- The density of Na+ channels is maximum at
- Soma
- Nodes of Ranvier
- Dendrite
- Surface of myelin
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- The length of muscle at which it develops maximal isometric active tension is called
- Maximum length
- Active length
- Initial length
- Resting length
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- Action potential
- Requires subthreshold stimulus
- Does not show All or none phenomenon
- Does not show decremental response
- Can be summated
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- Ovulation in a woman with normal health and cycle, occurs at
- Just after corpus luteal maturation
- During progesterone rise
- 14 days prior to start of menstrual bleeding
- Just before LH surge
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- Most distinguishing feature between skeletal muscle and smooth muscle is
- Tropomyosin
- Myosin
- Actin
- Troponin
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- Which of the following is not true about cardiovascular maternal changes in pregnancy
- Systolic pressure increases
- Heart rate increases
- Stroke volume increases
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- Which of the following is not true about testes
- Present in scrotal sac to have temperature less than body temperature
- Contraction of dartos muscle elevates testes
- Pampiniform plexus of blood vessels have counter current system to maintain temperature of testis
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- Which cell in CNS lay myelin sheath
- Stellate cells
- Astrocytes
- Basket cells
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- Which of the following is the main hormone for milk synthesis and secretion
- Progesterone
- Estrogen
- Oxytocin
- The dorsal root of spinal cord is sensory and ventral root is motor. This is called:
- Rexed laminar principle
- Weber-Fechner law
- Muller's doctrine of nerve energy
- Which is the best female contraceptive method after child birth, but desirous of further deliveries
- Tubectomy
- Diaphragms
- Intrauterine Device
- Oral Contraceptive Pills
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- Which of the following is the major neurotransmitter in the nigrostriatal pathway
- Noradrenaline
- Acetylcholine
- Serotonin
- Dopamine
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- Which of the following is the specific nucleus of thalamus
- Ventral posterolateral
- Midline
- Intralaminar
- Centro median
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- Purkinje cells from the cerebellum end on
- Cerebral cortex
- Extrapyramidal system
- Cranial nerve nuclei
- Deep cerebellar nuclei
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- Which of the following is not true about stretch reflex
- Also called myotatic reflex
- Afferent is Ib fiber
- Monosynaptic reflex
- A branch of afferent terminates on inhibitory interneuron
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- The nucleus involved in formation of Papez circuit is
- Pulvinar
- Anterior nucleus of thalamus
- Intralaminar
- VPL nucleus
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- Which of the following is not a component of vestibular apparatus
- Utricle
- Saccule
- Cochlea
- Semicircular canal
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- The processing of short term memory to long term memory is done (consolidation of long term memory occurs) in:
- Prefrontal cortex
- Hippocampus
- Neocortex
- Amygdala
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- All except one are under the control of hypothalamus
- Increase in heart rate during exercise
- Food intake
- Pituitary hormone (hypophyseal) regulation
- Temperature regulation
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