Tamil Nadu Dr MGR Medical University 2005 M.B.B.S Physiology-Including Biophysics II - - Question Paper

[KM 503]    Sub. Code : 4054

FIRST M.B.B.S. DEGREE EXAMINATION,

(Non-Semester)

(Revised Regulations}

Paper IV PHYSIOLOGY INCLUDING BIO-PHYSICS H

Time : Three hours    Maximum : 100 marks

Theory : Two hours and    Theory: 80 marks

forty minutes

M.C.Q.: Twenty minutes    M.C.Q.: 20 marks

Answer ALL questions.

Draw suitable diagrams wherever necessary.

L Write Essay on the following:    (2 x 15 = 30)

(1) Define cardiac cycle. Describe the pressure changes in the left ventricle, left atrium and aorta during cardiac cycle. What is second heart sound?

(2 +10 + 3)

{2) What is stretch reflex? Describe in detail the structure and functions of muscle spindle. Add a note on reciprocal inhibition.    (2 + 5 + 5 + 3)

II. Write short notes on:    (10x5*50)

(a)    Regulation of coronary blood flow

(b)    Hypoxic hypoxia

(c)    Decompression sickness

(d)    Definition and measurement of functional residual capacity

(ft)    Role of hypothalamus on hunger perception

(f)    Mechanism of accommodation for near vision

(g)    Structure and functions of middle ear

(h)    Taste pathways

(i)    Chloride shift

(j) Stages of Asphyxia.