PHYSIOLOGY Online Test and Answers Pdf Download :-
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1. Damage to sensory area 1 of the cerebral cortex results in
a) Loss of perception of pain
b) Loss of tactile and two point discrimination
c) Loss of perception of touch
d) Loss of only tactile discrimination
Answer:b
2. Volume of CSF is about
a) 50ml
b) 100ml
c) 150 ml
d) 200 ml
Answer:c
3.Dissymmetria is seen in
a) Extra pyramidal lesions
b) Cerebellar lesions
c) Pyramidal lesions
d) Cortical lesions
Answer:b
4.Floculonodular lobe of cerebellum is concerned with
a) Equilibrium
b) Co-ordination
c) Baroreception
d) Chemoreception
Answer:a
5.In the postnatal period the greatest growth in the grey matter of the C.N.S is of a) Neuron cell number
b) Length of axon
c) Dendritic tree
d) Size of Perikaryon
Answer:c
6.CSF production per minute
a) 0.30-0.35 ml/min
b)0.5ml/min
c)2ml/min
d) 1 ml/min
Answer:a
7.Function of GABA on CNS is
a) Neuronal inhibition
b) Neuronal activation
c) Glial cell inhibition
d) Glial cell activation
Answer:a
8.The EEG rhythm having lowest frequency is:
a) Alpha
b) Beta
c) Delta
d) Theta
Answer:c
9.Medial geniculate body is concerned with
a) Hearing
b) Vision
c) Smell
d) Taste
Answer:a
10.True statement regarding CSF is
a)Daily production < 700 ml
b)CSF analysis rules out active secretion as a cause of formation of CSF
c)It flows from III ventricle to the IV ventricle
d) Produced only by choroid plexus
Answer:c
11. In cerebellar disease, all the statements are correct except
a) The Romberg’s sign is positive
b) There is Adiodokokinesia
c) There is pendular knee jerk
d) There is involuntary tremor
Answer:d
12.Swallowing center is situated in
a) Midbrain
b) Pons
c) Medulla
d) Cerebellum
Answer:c
13.Hyper kinetic syndromes such as chorea and athetosis are usually associated with pathological changes in:
a) Motor areas of cerebral cortex
b) Anterior hypothalamus
c) Pathways for recurrent collateral inhibition in the spinal cord
d) Basal ganglia complex
Answer:d
14. An EEG:
a)Provides indication of intelligence
b)Tends to show waves of smaller amplitude during deep sleep than of alert state
c)Show waves with a lower frequency during intense thought than during sleep
d)Is bilaterally symmetrical
Answer:d
15.The following is true about brain metabolism except
a) Use fatty acid in starvation
b) In resting state 60% of total energy utilized
c) Ketone bodies are used in starvation
d) Has no energy store
Answer:a
16.Satiety center in hypothalamus is regulated by:
a) Gastric dilatation
b) Blood glucose levels
c) Blood insulin leve
d) All of the above
Answer:b
17. In hippocampus EEG waves are
a) Alpha wave
b) Beta wave
C) 65 mm of Hg
b)55mmofHg
Answer:d
18.EEG with spike and dome pattern is characteristic of epilepsy
a) Jacksonian
b) Grandmal
c) Petitmal
d) Temporal lobe
Answer:c
19.Buerger waves (alpha waves) of EEG have the rhythm per sec of:
a) 0-4
b)4-7
c)8-13
d) 13-30
Answer:c
20.All the following are more in CSF compared to plasma except
a)Mg
b)Cl
c)HC03
d) Glucose
Answer:d
21. During light sleep, the sleep spindles that appear have the frequency of:
a) 1 -2/sec
b) 6-12/sec
c) 14-16/sec
d) 21 -26/sec
Answer:c
22.Up to what systolic pressure is the brain capable of auto regulation
a) Dorsomedian nucleus of hypothalamus
b) Ventromedian nucleus of hypothalamus
c) Perifornical region
d) 75mmofHg
Answer:a
23. pH of CSF is:
a) 7.13
b) 7.23
c) 7.33
d) 7.40
Answer:b
24.Temporal lobe lesion causes:
a) Homonymous upper quadrantinopia
b) Homonymous lower quadrantinopia
c) Bitemporal hemianopia
d) Binasal hemianopia
Answer:a
25.Hyperphagia results from lesion of
a) Thalamus
b) Cerebral cortex
c) Ventromedial region of supra-optic nucleus
d) Ventrolateral region of supra-optic nucleus
Answer:c
26. Delta waves in EEG are seen in
a) Deep sleep
b) REM sleep
c) Awake with eyes open
d) Awake with eyes closed
Answer:a
27. Nightmares are seen in
a) REM sleep
b) NREM stage II
c) NREM stage III
d) NREM stage IV
Answer:a
28. Which of the following are true of median eminence
a) Portion of ventral hypothalamus
b) Hypothalamo hypophyseal vessels arise here
c) Outside the blood-brain barrier
d) All are correct
Answer:d
29. Unconscious kinesthetic sensations are carried by
a) Posterior columns
b) Ventral spinothalamic tract
c) Anterior spinothalamic tract
d) Lateral spinothalamic tract
Answer:a
30. Crossed extensor reflex is a
a) Withdrawal reflex
b) Postural reflex
c) Monosynaptic reflex
d) Sympathetic reflex
Answer:a
31.Renshaw cell inhibition is an example of
a) Feed-forward inhibition
b) Oscillating motor activity
c) Circuitry for bio feedback
d) All of the above
Answer:a
32.Arousal response is mediated by
a) Dorsal column
b) Reticulo activating system
c) Spinothalamic tract
d) Vestibulo cerebellar tract
Answer:b
33.All are seen in a spinal reflex except
a) Summation
b) Fatigue
c) Memory
d) Adaptation
Answer:b
34.First change to occur in the distal segment of cut nerves
a) Myelin degeneration
b) Axonal degeneration
c) Mitosis of Schwann cell
d) Sprouting
Answer:b
35.Maximum increase in pain threshold occurs in which phase of sleep
a) Phase I
b) Phase 3
c) Phase 4
d) REM sleep
Answer:d
PHYSIOLOGY Objective Questions with Answers
36.Below pressure, CSF absorption stops
a)60mmCSF
b)68mmCSF
c)80mmCSF
d)50cmCSF
Answer:b
37.Phagocytosis in the CNS is done by
a) Astrocytes
b) Schwann cells
c) Microglia
d) Oligocytes
Answer:c
38.The condition known as REM sleep is:
a)That point at which the individual becomes aware and alert
b)Referred to paradoxical sleep
c) Characterized by total lack of all muscular activity
d) Characterized by slow high voltage regular EEG activity
Answer:b
39.Gag reflex is mediated by cranial nerve:
a)VH
b)IX
c)X
d)XII
Answer:b
40.Hypertonia indicates
a) Upper motor neuron injury
b) Lower motor neuron injury
c) Cerebellar lesion
d) Autonomic imbalance
Answer:a
41.What is not true for respiration center?
a)Situated in the medulla and pons
b)Sends out regular bursts of impulses to expiratory muscles during quiet respiration
c)sends out regular impulses to expiratory muscles during quiet respiration
d)Is inhibited during swallowing and vomiting
Answer:c
42.In brain ischaemia, systemic blood pressure rises, this is called:
a) Monro-kellie doctrine
b) Cushing reflex
c) Auto regulation
d) White reaction
Answer:b
43.Vestibular fibers relay in
a) Vermis
b) Lateral geniculate body
c) Floculonodular lobe of cerebellum
d) Auditory cortex
Answer:c
44.Vomiting center is situated in the
a) Hypothalamus
b) Amygdala
c) Pons
d) Medulla
Answer:d
45. Broca’s area
a) Is situated in temporal lobe
d) It is synonymous to Wernicke’s area
c) Is an area of hearing
b) Is supplied by middle cerebral artery
Answer:c
46.Crude touch sensations are carried by
a) Lateral spinothalamic tract
b) Posterior columns
c) Ventral spinothalamic tract
d) P)tramidal tract
Answer:c
47.One of the following is a function of hypothalamus
a) Swallowing
b) Vomiting
c) Respiration
d) Homeostasis of temperature
Answer:d
48.Blood brain barrier is maximum permeable to:
a)Na+
b)K+
c) Chloride
d)CO,
Answer:d
49.The basic postural reflex is
a) Crossed extensor reflex
b) Golgi tendon reflex
c) Flexor reflex
d) Positive supporting reflex
Answer:c
50.All of the following manifestations are seen in cases of cerebellar damage in human beings except
a) Loss of non-declarative/reflexive memory
b) Loss of adjustment of ve9tibulo-ocular reflex
c)Static tremor and rigidity
d) Ataxia, atonia and asthenia
Answer:c
51.Which of the following reflexes disappear in the absence of functional connections between the spinal cord and the brain?
a) Swallowing reflex
b) Seating reflex
c) Withdrawal reflex
d)Erection of penis
e) All of the above
Answer:a
52. In the Neurohypophysis, secretory granules accumulate in:
a) Pituicytes
b) Nerve endings
c) Intercellular spaces
b) Association fibers
Answer:b
53. Conduction in which type of nerve fibers is blocked maximally by pressure
a) C fibers
b) A-alpha fibers
c)A-Beta
d)A-gamma
Answer:c
54.Prosapagnosia is
a) Inability to recognize faces
b) Inability to draw
c) Inability to count
d) Inability to smell
Answer:a
55. Pain sensitive part in CNS is
a) Durameter
b) Piameter
c) Brain
d) Pial vessels
Answer:a
56.Wallenberg degeneration is seen in
a) Proximal cut end of nerve with cell body
b) Distal cut end of nerve without cell body
c) Both the free ends of the cut nerve
d) All are true
Answer:a
57.When sensory area-I of the cerebral cortex is ablated
a) Perception of pain is completely abolished
b) Perception of touch is completely abolished
c)There is loss of tactile localization but two point discrimination is not bolished
d)There is loss of tactile discrimination as well as two-point discrimination
Answer:d
58.Injection of hypertonic saline into which area causes diuresis
a) Supraoptic nucleus
b) Paraventricular nucleus
c) Preoptic nucleus
d) Posterior pituitary
Answer:a
59.A unilateral upper motor neuron lesion in the internal capsule is best characterized by
a)Diminished use of contra lateral appendages below the lesion
b)Muscle fasciculations
c)Ipsilateral hypotonicity
Answer:a
60. Source of EEG
a) A potential of pyramidal cells
b) A potential of ganglion cells
c)EPSP and IPSP of cortical cells which behave like dipoles
d)After potentials of parietal cortex
Answer:c
61. Decerebrate animal results from the following experimental procedure:
a) Removal of the cerebrum
b) Tran section at the upper border of midbrain
c) Inter collicular transection
d) Section above the thalamus
Answer:c
62.CSF pressure (lumbar)
a)70-180mmCSF
b)50-100mmCSF
c)>200mmCSF
d) 150-250 mm CSF
Answer:a
63.Which of the foUowing sensation is not carried through posterior column?
a) Touch
b) Proprioception
c) Visceral pain
d) All of the above
Answer:c
64. Stereo anesthesia is due to lesion of
a) Nucleus Gracillis
b) Nucleus cuneatus
c) Spinoreticular tract
d) Subarachnoid space
Answer:b
65.Broca’s area is present in
a) Superior temporal Gyrus
b) Precentral gyrus
c) Post central gyrus
d)Inferior frontal gyrus
Answer:d
66.The cerebellum:
a)Has a totally inhibitory output from its cortex
b)Has only excitatory signal output from its deep nuclear layers
c)Has conscious interpretation of motor activity
d)Has inhibitory influence on muscle tone in humans
Answer:a
67.Hypothalamus regulates all except
a) Food intake
b)Temperature
c) Anticipatory rise in heart rate
d) Hypophysis
Answer:c
68.Loss of feel of size & shape of a object is seen in lesions of
a)Tractus solitarius
b) Tractus cuneatus
c) Lateral spinothalamic tract
d)Spinoreticular tract
Answer:b
67.The reticular formation is a diffuse collection of:
a) Only sensory neurons
b) Only motor.neurons
c) Only autonomic centers
d) All the above
Answer:d
68.CSF is principally secreted by
a) Choroid plexus
b) Arachnoid granulation
c) Floor of fourth ventricle
d)Periaqueductal grey
Answer:a
69.Paralysis agitans is accompanied by imbalance of neurotransmitter contents in
a) Globus pa’llidus and substantia nigra
b) Locus ceruleus
c) Putamen
d) Caudate nucleus and subthalamic body
Answer:a
70.In Rrown-Sequard syndrome sensation, that is lost at the same side of lesion is
a) Pain
b) Touch
c) Temperature
d) Proprioception
Answer:d