Final answer:
No, a standard voltmeter cannot measure action potentials as they are rapid and require more sensitive equipment.
Step-by-step explanation:
It is false that you can use a standard voltmeter to measure action potential in neurons. Action potentials involve rapid changes in voltage across a neuron's membrane and require sensitive and specialized equipment, like an oscilloscope or a patch-clamp, to measure these rapid changes accurately. Nevertheless, theoretically, if you had a voltmeter with incredibly fast response times and very high input impedance, you might capture some aspects of the action potential, but standard voltmeters are not designed for this purpose.
The action potential is a momentary change in the electrical potential across a cell membrane that occurs when a neuron sends a signal. During an action potential, the voltage across the cell membrane quickly rises and falls due to the movement of ions, following a well-defined sequence of events.