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Biomedical Instrumentation MCQs Set 2

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1. What are generally designed to have a very high value of input impedance to take care of high electrode impedance?




2. Voltage difference between an active electrode on the scalp with respect to reference electrode at ear lobe or any other part of body is known as ___________ recording.




3. How is bipolar recording done?




4. EEG signals picked up by surface electrodes are usually small as compared to ECG.




5. A pattern of electrodes on the head and the channels they are connected to are __________




6. Where is the reference electrode placed?




7. What is the typical value of the calibration signal?




8. Preamplifiers used in electroencephalograph have high gain and low noise characteristics.




9. EEG machines have notch filter sharply tuned at _______ Hz as to eliminate mains frequency interference.




10. What is the typical frequency range of standard EEG machines?




11. Pure-tone audiometers usually generate test tones in octave steps from ___________




12. Speech audiometry normally allows measurements to be made within the frequency range of _____




13. The signal intensity of Pure-tone audiometers ranging from ______




14. The frequency range of pure-tone audiometer is more than that of speech audiometer.




15. ___________ amplifier circulatory is employed to reduce the hum noise generated by the power supply in the ECG circuit.




16. The unit of sensitivity of an electrocardiograph is ________




17. The volume of blood outside the dialyzer is known as priming volume.




18. The range of CMRR of Foetal electrocardiogram is ______________ a) 0-120 dB b) 0-200 dB c) 0-150 dB d) 0- 130 dB




19. Power Line Hum is responsible for most of common-mode interfering signal.




20. What is the role of Cupraphan in haemodialysis?




21. Which of the following is the property of instrumentational amplifier?




22. Foetal ECG signal detected via electrodes placed on mother’s abdomen is complex and requires attenuation of maternal signals for obtaining FHR.




23. The blood is a good conductor of electricity.




24. The range of FHR measurement due to substitution logic is between __________ bpm.




25. The tympanic membrane separates the ear canal from the _____________




26. The middle ear is exposed to atmospheric pressure only through the _______




27. The major function of the middle ear is ____________




28. The human ear responses to vibrations ranging from ___________




29. Name the bone that rests upon the lower end of the cochlea and passes the vibrations directly into the fluid within.




30. Air conduction, by definition, is the transmission of sound through the external and middle ear to the internal ear.




31. The hearing threshold is an invariable fixed intensity above which sound is always heard and below which sound is never heard.




32. Unit of sound intensity ________




33. Sound intensity is proportional to the _________ of sound pressure.




34. Decibel expresses the logarithm of the ratio between two sound _________




35. What is the unit of dB?




36. If I1 and I2 are two intensities in watts per square centimetre, then the number of decibels with which they are related can be expressed as _________




37. __________ is specialized equipment, which is used for the identification of hearing the loss in individuals.




38. Which threshold of hearing is measured by a pure-tone audiometer?




39. Speech audiometers are normally used to determine ______________




40. How many kidneys does a human have?




41. The removal of waste products from blood plasma is performed by ___________




42. The regulation of the composition of blood plasma is done by which of the following organ?




43. Each kidney consists of about a million individual units, all similar in structure and function. These tiny units are called __________




44. Which of the following is the correct anatomical position of the kidney?




45. Each kidney consists _______ number of nephrons.




46. The kidneys work only on plasma.




47. The ___________ carry blood at very high pressure from the aorta into the glomerular capillary.




48. The total amount of glomerular filtrate is about ____________ per day.




49. The amount of urine formed by an average kidney in one day is ________




50. Which hormone of the pituitary gland helps to automatically reabsorb water from the kidney?