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[MBBS 0123] JANUARY 2023 Sub. Code : 6054
M.B.B.S. DEGREE EXAMINATION
(For the candidates admitted from the Academic Year 2019-2020)
FIRST YEAR - (CBME)
PAPER II - PHYSIOLOGY
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O.P. Code: 526054
Time: 30 Minutes Maximum : 20 Marks
Answer All Questions
Choose one correct answer in the box provided in the Answer Script. No overwriting should be done. Choice should be given in Capital Letters.
II1. Multiple Choice Questions: (20x1=20)
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- Heart rate in atrial flutter is about
A) 95— 150 beats B) 100—175beats C) 200 — 350 beats D) >350 beats - “Last ditch stand” pressure control mechanism is by
A) Baroreceptor reflex B) Chemoreceptor reflex
C) CNS ischemic response D) Atrial reflex - Frank — Starling’s law implies
A) Increase in venous return increases cardiac output
B) Increased vagal discharge increases cardiac output
C) Increased heart rate causes increased cardiac output
D) Increased blood pressure increased cardiac output - “Machinery murmur” is heard in
A) Tetralogy of Fallot B) Patent ductus arteriosus
C) Ventricular septal defect D) Atrial septal defect - Transit time from arteriolar to the venular end of an average-sized capillary is
A) 6-8 seconds B) 10-15seconds C) 1-2seconds D) 3-4 seconds - Measurement of lung volumes with a body plethysmograph uses
A) Dalton’s law B) Henry’s law C) Boyle’s law D) Graham’s law - In healthy individuals, Physiological dead space is
A) Double than that of anatomical dead space
B) Equal to anatomical dead space--- Content provided by FirstRanker.com ---
C) Less than that of anatomical dead space
D) Triple than that of anatomical dead space - A) >00 7 7 7 1500 1 - D) > 1200 ml
- Primary stimulus for the excitation of the chemosensitive neurons
A) H+ B) CO2 C) 02 D) HCO3- - When a person is using exclusively fats for metabolic energy, the Respiratory exchange ratio (R) will be
A) 15 B) 0.7 C) 0.4 D) 0.8 - The synapse in cerebral and cerebellar cortex is located commonly in the .
A) Axon hillock B) Dendritic spines C) Axon D) Soma - Jendrassik’s maneuver facilitates knee jerk due to increased discharge.
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A) a motor neuron B) ß motor neuron C) ? motor neuron D) d motor neuron - Annulospiral endings are
A) Group Ia fibres B) Group II fibres
C) Dynamic Gamma fibres D) Static gamma fibres - Which of the nucleus plays a major role in cognitive control of motor activity?
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A) Putamen B) Caudate C) Substantia nigra D) Subthalamus - Thalamus contains inhibitory neurons in
A) Midline nucleus B) Intralaminar nucleus
C) Thalamic reticular nucleus D) Ventroposterolateral nucleus - Mossy fibres in cerebellum make direct synaptic connection with
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A) Granule cells B) Purkinje cells C) Stellate cells D) Basket cells - Normal CSF pressure when a person is lying in horizontal position averages
A) 100 mm of H2O B) 90 mm of H2O C) 130 mm of H2O D) 200 mm of H2O - Lesion in optic chiasma causes
A) Bisal hemianopia B) Bitemporal hemianopia--- Content provided by FirstRanker.com ---
C) Contralateral homonymous hemianopia D) Ipsilateral complete blindness - Vitamin A is stored in of retina
A) Ganglion cell layer B) Pigment epithelial layer
C) Outer nuclear layer D) Inner nuclear layer - The central fovea contains more of
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A) Cones B) Rods C) Both rods and cones D) Ganglion cells.
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