Q.

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
Answer» B. micro-electrodes
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.
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