Question

Which type of electrodes are employed to study the electrical activities of individual cells?

(a) milli-electrodes

(b) micro-electrodes

(c) surface-electrodes

(d) pre-jelled electrodes

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This interesting question is from Microelectrodes in portion Bioelectric Signal and Electrodes of Biomedical Instrumentation

Answer 1

Correct choice is (b) micro-electrodes

Best explanation: To study the electrical activities of individual cells, micro electrodes are employed. This type of electrode is small enough with respect to the size of the cells. Typical micro electrodes have tip dimensions ranging from 0.5-5 microns.