Multiple choice

The transmembrane potential can be measured by a/an

  1. microscope

  2. electroscope

  3. cathode ray oscilloscope

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Transmembrane potential is an electrical measurement that requires an instrument capable of detecting voltage changes. A cathode ray oscilloscope (CRO) displays voltage signals over time and can be used with microelectrodes to measure membrane potentials. Microscopes visualize structure, electroscopes detect static charge, and neither measures dynamic bioelectric potentials.

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