IIIV B.Tech.(I-Semester) Examination. Nov, 2002 BIO-ELECTRIC PHENOMENA (Bio-Medical Engineering) Max.Marks:70 Answer any FIVE questions All questions carry equal marks *** 1.a) b)
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Time: 3 hours.
Write down Nernst Equation and Explain its significance to a certain bio electric phenomenon. Explain nerve conduction membrane properties from the angle of current-voltage relations.
Explain (drawing necessary illustration) the propagation of impulses in unmyelinated and myelinated nerve fiber. Also what is membrane conductance?
3.
What do you mean by electrical activity of the heart. How einthvens triangle helps us to know the electrical axis of the heart. What are the argumented limb leads?
4.a)
Explain how solid angle computations help us to understand volume conductor fields. Explain (i) The bioelectric sources (ii) Inhomogeneous media.
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5.a) b)
With an appropriate example. Explain the electrical activity of a skeletal muscle. What are motor unit potentials? What are their role in Neuromuscular transmission?
6.a)
Explain what fatigue and conduction of chemical agents have to do with electrical activity of skeletal muscles. Explain how the EMG waveform helps us to correlate the motor unit potentials in the gradation of a certain muscular activity
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b)
Explain in detail how the principles of bio-electric phenomena help us to realize, correlate and then measure the resistance of tissues. Draw necessary illustrations if nud be.
8.
Write short notes on: a) ECG complexes b) Electrical properties of receptors.
5.a) With an appropriate example. Explain the electrical activity of a skeletal muscle. b) What are motor unit potentials? What are their role in Neuromuscular.
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