Saltatory conduction (a) requires more energy than...

Saltatory conduction (a) requires more energy than continuous conduction (b) occurs in unmyelinated neurons (c) occurs when the action potential jumps from one node of Ranvier to the next (d) slows transmission of an impulse (e) depends on the action of $\mathrm{CABA}$

Key Concepts

Saltatory Conduction

Saltatory conduction is a mode of electrical impulse propagation along a nerve fiber where the action potential leaps from one node of Ranvier to the next, rather than traveling continuously along the entire length of the axon. This process increases the speed of neuronal communication and is more energy-efficient compared to continuous conduction in unmyelinated fibers.

Myelination

Myelination refers to the process by which a fatty insulating layer, known as myelin, is formed around the axon of a neuron. This myelin sheath reduces the leakage of electrical current and increases the speed of action potential propagation, thereby enhancing the efficiency of saltatory conduction.

Nodes of Ranvier

Nodes of Ranvier are periodic gaps in the myelin sheath along a myelinated axon. These nodes are critical for saltatory conduction because they are the sites where the action potential is regenerated, allowing the impulse to effectively 'jump' across the myelinated segments and rapidly propagate down the axon.

Action Potential Propagation

Action potential propagation is the process by which electrical impulses travel along a neuron. In myelinated neurons, this propagation is dramatically improved by saltatory conduction, where the action potential efficiently hops between nodes of Ranvier, resulting in faster signal transmission and reduced energy consumption.

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