Which Statement Most Accurately Describes the Length of Axons

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E The diameter of the axon explains this. The layer IIIII neurons that form PFC networks lose dendritic material that is dendrite length branching and spine density are reduced by chronic stress 104 105.

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B They have myelinated axons.

. Which statement below best describes why action potentials travel in only one direction. C They have a refractory period. Spine loss is particularly evident at distal sites 200 µm from the soma and the mushroom-shaped spines that are probably involved in established synaptic connections seem to be particularly vulnerable 106.

In nature myelinated segments are generally long enough for the passively propagated signal to travel. Click and drag the labels to the correct structure at the chemical synapse. When an action potential arrives at the end of the axon terminal a series of events take place that result in the release of neurotransmitter from the presynaptic axon.

22 A The all-or-none principle explains this. D Only sodium- and potassium-gated channels are found on the axon. Select the answer that correctly describes the.

They should be as long as possible to maximize the speed of conduction but not so long that the arriving signal is too weak to provoke an action potential at the next node of Ranvier. Small consecutive steps of Na penetration into the axon along its length. The length of axons myelinated segments is important to the success of saltatory conduction.

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