Propagation of Action Potentials definitions Flashcards

The unidirectional spread of an action potential down the axon membrane.

A series of events involving depolarization and repolarization of the axon membrane.

A slow propagation along unmyelinated axons where each segment depolarizes sequentially.

A rapid propagation along myelinated axons where action potentials leap between nodes of Ranvier.

The process where voltage-gated sodium channels open, allowing sodium ions to enter the axon.

A period following an action potential during which the axon cannot be depolarized again.

An insulating layer around axons that speeds up neural communication by preventing current leakage.

Gaps between myelin sheaths where depolarization occurs during saltatory conduction.

Channels that open in response to changes in membrane potential, allowing sodium ions to enter.

The electrical potential difference across the axon membrane, crucial for action potential propagation.

Positively charged ions that enter the axon during depolarization, contributing to action potential propagation.

The loss of electrical current from the axon, prevented by myelin in saltatory conduction.

Axons lacking myelin, resulting in slower continuous conduction of action potentials.

Axons covered with myelin, allowing for faster saltatory conduction of action potentials.

The origin of the term 'saltatory', meaning to leap, describing the action potential's movement.