Date: 04-01-2022
Instructions:
RUHS
First Year MBBS Examination
I MBBS PHYSIOLOGY PAPER I

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Time: 3 hours
INSTRUCTIONS: Attempt all questions in both
sections: (Use separate answer book for each
section)
Section 1

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Max Marks: 100
1. Fill in the blanks: (6)
a. The viability of the spermatozoa within the
female genital tract is up to
____________________

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b. In Parkinson's disease degeneration
______________________ neurons occurs.
c. The deep reflexes become weak and
pendular in ______________________
lesion.

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d. Dwarfism is due to hypo secretion of
______________________
e. Glucose enters in the intestine and renal
tubules by ______________________
transport.

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f. Diabetes insipidus develops due to the
deficiency of ______________________
2. Choose the correct option in the following
multiple choice questions: (4)
a. Chronaxie is a useful index of: a) Excitability

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b) Contractility c) Conductivity d) Rhythmicity
b. Following are the properties of chemical
synapse except: a) Fatigue b) Summation c)
Two way conduction d) Occlusion
c. Consolidation of memory is a function of: a)

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Cerebral cortex b) Limbic system c)
Thalamus d) Hippocampus
d. Testosterone is secreted by: a) Leydig cells of
testes b) Sertoli cells of testes c) Seminal
vesicles d) Prostate

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3. A 20-year old male patient reported to
hospital with failure to gain height from the age
of 8 years, poor secondary sexual
characteristics and mental retardation (15)
based on the above case scenario. Answer the

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following questions:

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a. What is the most likely diagnosis for this
condition?
b. Name the probable gland with its
pathophysiology.

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c. What are the other characteristic of the
disease diagnosed?
4. Write short notes on (Any five): (10)
a. Conditioned reflex
b. Flexor withdrawal reflex

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c. Menarche
d. Corpus luteum
e. Astigmatism
f. Somatostatin
5. Explain briefly (Any three): (15)

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a. Oral contraceptives
b. Cushing syndrome
c. Sodium potassium pump
d. Neuromuscular junction
Section 2

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6. Enumerate the hormones secreted by the
thyroid gland. Describe the function of thyroid
hormones. Add a note on Myxedema. (20)
7. What will happen and why (Any fivc): (10)

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a. Incomplete transaction of spinal cord.

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b. Cerebellar hemisphere lesion.
c. If LH surge in an ovulatory cycle is absent.
d. Lesion of optic chiasma.
e. To menstrual cycle in a breast-feeding lady.
f. If vascular blockage of the thalamus occurs.

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8. Explain briefly (Any four): (20)
a. Myasthenia gravis
b. Renal (kidney) function tests
c. Functions of insulin
d. Suckling reflex

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e. Composition and functions of cerebrospinal
fluid (CSF)
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