In myelinated nerve fibers, action potentials are produced at the ..... (location).

SYNAPTIC PHYSIOLOGY

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

In myelinated nerve fibers, action potentials are produced at the ____ (location).

A	Synaptic Cleft
B	Nodes of ranvier
C	Dendrite
D	None of the above

Explanation:

Detailed explanation-1: -The Nodes of Ranvier are only present when the axon of a neuron is myelinated. Myelination allows for an increased rate of action potential transmission due to action potentials “jumping” between Node of Ranvier, this is called saltatory conduction.

Detailed explanation-2: -Myelinated axons only allow action potentials to occur at the unmyelinated nodes of Ranvier that occur between the myelinated internodes.

Detailed explanation-3: -Nodes of Ranvier are found in myelinated nerve fibres. These are the gaps between two adjacent myelin sheaths.

Detailed explanation-4: -Action potential These rapid reversals are mediated by voltage-gated ion channels found in the plasma membrane. The action potential travels from one location in the cell to another, but ion flow across the membrane occurs only at the nodes of Ranvier.

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