Multiple choice

The transmembrane potential can be measured by ______ electrode(s).

  1. 1

  2. 2

  3. 3

  4. 4
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

To measure transmembrane potential (voltage difference across a membrane), you need two electrodes: one inside the cell and one outside in the extracellular fluid. A single electrode cannot measure a voltage difference - it requires two reference points.

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