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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. Before placing the electrodes the skin should be __________
2. The delta wave in EEG ranges from ___________
3. 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 __________
4. Phonocardiography is listening to __________
5. _______________ instrument is used to hold patients head and guide the placement of electrodes.
6. Do metallic micro electrodes exist.
7. After a cell is stimulated, a finite period of time is required for the cell to return to its pre-stimulus state. This period is known as ____________
8. Number of cloud deployment models that are recognized are _________
9. Source of Bioelectric potential is ____________ in nature.
10. Letter F in the EEG electrode placement system denotes?
11. Which of the following is a preferred electrode for measuring EMG?
12. Cells depolarize and action potential in generated as soon as a stimulus is applied.
13. When intramuscular EMG is required to look into the electrical activities of deeper or overlaid muscles, ________ electrodes are used.
14. Metallic micro electrodes have impedance ________ compared to conventional electrodes?
15. Off-set potential is _____________
16. Impedance pneumography is a commonly-used technique to monitor a person’s _______
17. According to the international 10/20 system to measure EEG, odd number denotes which side of the brain?
18. Welsh cup electrodes have __________
19. Which of the following is not preferred for electrode making?
20. Glass microcapillaries are preferred over metallic electrodes because of the former _______
21. Which of the following is a wireless ECG acquiring system?
22. Generally what is the material of needle electrodes?
23. All electrode potentials are measured with respect to which reference electrode?
24. In voluntary contraction of the skeletal muscles, the muscle potential ranges from ________
25. Palsied muscles mean _____________

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