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Biomedical Instrumentation Practice Test: Bioelectric Signal & Electrodes
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Bioelectrical signals are generated by nerves and muscle cells. Commonly used bioelectrical signals include electroencephalography (EEG), electrocardiography (ECG), electromyography (EMG), electrodermal activity (EDA) and heart rate variability (HRV). Electrodes transfer from the ionic conduction in the tissue to the electronic conduction which is necessary for making measurements. Biosensors are devices that detect certain biochemical signals and convert them to electrical signals that can be measured.   Topics include: Bioelectric Signals Origin, Recording Electrodes, Silver-Silver... Show more
Biomedical Instrumentation Practice Test: Bioelectric Signal & Electrodes
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25 Questions

1. Cells depolarize and action potential in generated as soon as a stimulus is applied.
2. Atrio ventricular node is located at __________
3. Which of the following is a preferred electrode for measuring EMG?
4. Electrooculography (EOG/E.O.G.) is a technique for measuring what?
5. Electrodes make a transfer from the __________ in the tissue to the electronic conduction which is necessary to make measurements.
6. The contraction of the skeletal muscles results in the generation of action potential in the individual muscle fibers. Record of this action potential is called ______________
7. What is the signal amplitude of EEG?
8. When intramuscular EMG is required to look into the electrical activities of deeper or overlaid muscles, ________ electrodes are used.
9. Which type of electrodes are employed to study the electrical activities of individual cells?
10. The variation of the electrical potential associated with the passage of a pulse along the membrane of a muscle cell or a nerve cell is called __________
11. In voluntary contraction of the skeletal muscles, the muscle potential ranges from ________
12. Metallic micro electrodes have impedance ________ compared to conventional electrodes?
13. Which of the following is not preferred for electrode making?
14. Welsh cup electrodes have __________
15. Which of the following metal is preferred for manufacturing micro electrodes?
16. Electrodes to measure EEG are placed on ________
17. The principal ion that is not involved with the phenomena of producing cell potentials is ______________
18. Glass microcapillaries are preferred over metallic electrodes because of the former _______
19. According to the international 10/20 system to measure EEG, odd number denotes which side of the brain?
20. Which electrodes can work even after being induced to large electric discharge such as defibrillation?
21. The ground electrode is usually positioned over which body structures?
22. Needle electrode is used to measure ____________
23. Recording electrical activities associated with heart is known as ____________
24. Do metallic micro electrodes exist.
25. Monopolar needle electrodes are having coatings of which material over the stainless steel wires which are bare only at the tips?

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