Earthworm Action Potentials (Korean)

Students will obtain extracellular recordings of action potentials from an anesthetized earthworm. They will examine the threshold potential, the all-or-none response, the refractory period, and the conduction velocity of the nerve.

On completion, students will be able to:

• Describe the all-or-none response of a single axon.
• Determine nerve conduction velocity.
• Explain the difference between the absolute and relative refractory periods of a nerve and demonstrate the physiological significance of these periods.
• Understand the bidirectional nature of action potentials elicited electrically in a nerve.

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