BALOCHISTAN PUBLIC SERVICE COMMISSION
COMPETITIVE EXAMINATION 2021
FOR RECRUITMENT TO THE POSTS OF
ASSISTANT COMMISSIONER/SECTION OFFICER (B-17)
IN THE SERVICES & GENERAL ADMINISTRATION DEPARTMENT
PHYSIOLOGY
Total Marks: 150 July 12, 2021 Time Allowed: 03 Hours
NOTE: i Attempt any six questions. All questions carry equal marks.
ii All the parts (if any) of each Question must be attempted at one place instead of at different places.
iii Candidate must write Q No in the Answer Book in accordance with Q No in the Q Paper.
iv No Page/Space be left blank between the answers. All the blank pages of the Answer Book must be crossed.
v Extra attempt of any question or any part of the attempted question will not be considered.
Q No 1 a) Explain the main functions of basal ganglia. (10)
b) Explain the corticospinal pathway. (10)
c) List all the ascending tracts of the spinal cord. (05)
Q No 2 a) What is innate and acquired immunity? Explain with examples. (10)
b) Define anemia? How is anemia classified on the basis of etiology? (10)
c) Write a short note on body fluid compartments. (05)
Q No 3 a) Enumerate the layers of the respiratory membrane. (10)
b) What are the factors that affect the rate of diffusion of a gas across the respiratory membrane? (10)
c) Define menarche and menopause. (05)
Q No 4 a) Define and explain the law of gut. (10)
b) What are the functional types of movements of the gastrointestinal tract? (10)
c) What is primary active transport? (05)
Q No 5 a) Name the hormones secreted by the anterior and posterior pituitary gland. (10)
b) Explain the mechanism of action of thyroid hormone. (10)
c) What is the difference between a neuro-hormone and endocrine hormone? (05)
Q No 6 a) What are the different types of refractive errors and which type of lenses are required to correct these errors? (10)
b) Differentiate between conductive and sensorineural deafness. (10)
c) Draw and label normal waveform of ECG with intervals. (05)
Q No 7 a) Write a short note on generation of impulses in the SA node of the heart. (10)
b) Define blood pressure? Discuss Renin-Angiotensin-Aldosterone system. (10)
c) What is the Frank-Starling Law? (05)
Q No 8 a) What is action potential? Describe the stages of action potential. (10)
b) What are the differences between Apoptosis and Necrosis? (10)
c) What is the absolute and relative refractory period? (05)
Q No 9 a) What is glomerular filtration rate? Enumerate the factors that increase or decrease the glomerular filtration rate? (10)
b) Explain the normal micturition reflex. (10)
c) What is the countercurrent mechanism? (05)
Q No 10 a) Define and explain Cardiac output? (10)
b) What is baroreceptor reflex? (10)
c) What is vascular compliance? (05)
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