The following were extracellular recordings obtained from the giant nerve fibers of an earthworm after delivery of a depolarizing stimulus at the time indicated. Which of the following letters corresponds with the fiber that had the fastest action potential conduction velocity? OA ОВ C 0.05 0 -0.05 -0.1. + Action Potential 0.024 boe 0.004 0.002 stimulus delivered. O None of the above are correct; all had the same conduction velocity 0.006 C 0.008 0.01

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