Download NTRUHS 1st Year MBBS 2024 October Physiology Paper I MCQs Question Paper

Q.P. CODE : M102A020

Dr. NTR UNIVERSITY OF HEALTH SCIENCES: AP : VIJAYAWADA-520008

MBBS DEGREE EXAMINATION - OCTOBER, 2024

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FIRST M.B.B.S. EXAMINATION

PHYSIOLOGY PAPER- I (SET-C)

(Multiple Choice Questions)

Max Marks: 20

Time: 20 Minutes

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Note: Answer all questions.

SECTION-I (MCQs - 20 MARKS)

1X2=20

1. Erythrocyte sedimentation rate (ESR) is decreased in
   1. Iron deficiency anaemia
   2. Arthritis

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   3. Tuberculosis
   4. All of these
2. Erythropoiesis is inhibited by
   1. Thyroxine
   2. Estrogen

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   3. Intrinsic factor
   4. Interleukin 1
3. Phagocytosis is done by
   1. Lymphocyte
   2. Monocyte

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   3. Basophil
   4. Eosinophil
4. Abnormal Hb is
   1. Hb F
   2. Hb A

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   3. Hb S
   4. Embryonic Hb
5. In the kidney, Aldosterone mainly acts upon
   1. Proximal convoluted tubule
   2. Loop of Henle

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   3. Glomerulus
   4. Collecting duct
6. Clot retraction is a function of
   1. Fibrinogen
   2. Prothrombin

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   3. Plasminogen
   4. Platelet
7. How much sodium is normally reabsorbed in PCT?
   1. 67%
   2. 77%

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   3. 97%
   4. 50%
8. Which of the following increases the glomerular filtration rate (GFR)?
   1. Increase in hydrostatic pressure of Bowman's capsule
   2. Decrease in glomerular capillary hydrostatic pressure

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   3. Decrease in capillary permeability of
   4. Decrease in glomerular capillary oncotic pressure
9. The content of which of the following gases is maximum in inspired air?
   1. Oxygen
   2. Nitrogen

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   3. Carbon dioxide
   4. Carbon monoxide
10. Loop of Henle handles the following EXCEPT:
    1. Na+
    2. H+

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    3. CI-
    4. Urea
11. Normal ventilation-perfusion ratio is about
    1. 0.8
    2. 1.2

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    3. 0.5
    4. 2.5
12. Which of the following acts as a counter-current exchanger?
    1. Vasa recta
    2. Thick ascending limb of loop of Henle

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    3. Thin descending limb of loop of Henle
    4. Collecting duct
13. The maximum volume of air that can be expired after a maximal inspiratory effort
    1. Vital capacity
    2. Tidal volume

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    3. Expiratory reserve volume
    4. Residual volume
14. Most important stimulus to peripheral chemoreceptors is
    1. Decreased PO2
    2. Decreased CO2

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    3. Increased pH
    4. Increased HCO3
15. The conduction velocity is lowest in
    1. HIS bundle
    2. SA node

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    3. Ventricular muscle
    4. Internodal pathways
16. Increased airway resistance is caused by all EXCEPT:
    1. Forced expiration
    2. High lung volume

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    3. Dense air
    4. Breathing dust particles
17. If end diastolic volume is 160 ml and stroke volume is 80 ml, the ejection fraction is
    1. 40%
    2. 50%

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    3. 60%
    4. 70%
18. Cardiac muscle cannot be tetanized because of
    1. Rich blood supply
    2. Rich innervation

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    3. Longer absolute refractory period
    4. High myoglobin content
19. End diastolic volume increases when
    1. Intrathoracic pressure becomes more negative
    2. Total blood volume decreases

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    3. Right atrial pressure increases
    4. Ventricular compliance decreases
20. The 'v' wave of jugular venous pressure (JVP) curve is caused by
    1. Closure of the tricuspid valve
    2. Closure of the aortic valve

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    3. Contraction of the atrium
    4. Rise in pressure due to venous return

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