RUHS
First Year MBBS Examination
I MBBS PHYSIOLOGY PAPER I
Time: 3 hours Max Marks: 100
Instructions: INSTRUCTIONS: Attempt all

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questions in both sections: (Use separate
answer book for each section)
Section 1
1. Fill in the blanks: (6)
a. The coupling ratio for sodium potassium

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pump is ______
b. Initiation of action potential occur at ______
of neuron.
c. Melatonin is secreted by ______
d. Cells responsible for nourishment of sperm

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______
e. ECG rhythm having lowest frequency is
______
f. In an isotonic contraction of muscle ______
remain same.

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2. Choose the correct option in the following
multiple choice questions: (4)
a. Strongest stimulations for ADH secretion is:
a) Hyperosmolarity b) Hyponatremia c)

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Hypotension d) Hypovolemia

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b. Conscious proprioception is carried by: a)
Dorsal column b) Anterior spinothalamic tract
c) Lateral spinothalamic tract d) Vestibular
tract
c. Binasal Hemianopia occurs when the lesion

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is present in: a) Right optic nerve b) Optic
Chiasma c) Temporal retina d) Left
geniculocalcarine tract
d. Which body muscle can resist fatigue? a)
Skeletal muscle b) Cardiac muscle c) Smooth

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muscle d) Both a & b
3. A 35 year old female is taking oral pills to
avoid conception. She missed doses of pills
for two successive days.
a. What precautions should she take in this

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situation to avoid conception? (15)
b. What are the various contraceptive methods
in female?
c. Explain mechanism of action of oral
contraceptive pills.

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4. Write short notes on (Any five): (10)
a. Excitation contraction coupling
b. Diabetes insipidus
c. Gate control theory of pain
d. REM Sleep

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e. Organic of corti
f. Law of projection

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5. Explain briefly (Any three): (15)
a. Muscle spindle
b. Circadian rhythm

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c. Motor aphasia
d. Conditioned reflex
Section 2
1. Name parts of Basal ganglia. Describe causes,
features and treatment of Parkinsonism. (20)

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2. What will happen and why? (Any five): (10)
a. An individuals who sleep with their arm under
their head for long period.
b. To pain sensation after local rubbing.
c. To ovulation during breast feeding.

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d. To a person's vision when he enters into a
cinema hall.
e. To colour of skin in primary adrenal
insufficiency.
f. To eye muscle in myasthenia gravis.

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3. Explain briefly (Any four): (20)
a. Secondary active transport
b. Menstrual Cycle
c. Adrenogenital syndrome
d. Visual pathway

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e. Goitre
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