They have a higher density of voltage-gated Na+ channels per unit of membrane surface

APs have to be produced less often because there is less leakage of electrotonic current flow

APs have to be produced less often because they use unsalted conduction

APs are produced more often because of the lower leakage of electrotonic current so that CV is faster

They have more voltage-gated Na⁺ channels per unit of membrane surface

Larger than that produced by a threshold stimulus - but bot twice the size of the latter AP

Produce no APs as the neuron would become refractory to such a strong stimulus

Larger by an unknown amount than the AP produced by a threshold stimulus

Produce the same-sized AP as that produced by a threshold stimulus

Produce no APs as the neuron would be absolutely refractory to such a strong stimulus

The 1-2 ms period immediately after an AP

The period after the first 1-2 ms after an AP

The active flow of current from a depolarised site on the axon to adjacent resting sites

The passive flow of Na+ ions and Cl- ions from open channels on the axon to closed channels

The passive flow of current from a depolarised site on the axon to adjacent resting sites

The absolute refractory period refers to that time during which a stronger stimulus will lead to the generation of a new action potential

The relative refractory period coincides with the hyperpolarization phase of the action potential.

The relative refractory period refers to that time during which a stronger stimulus will lead to the generation of a new action potential

The refractory period is caused by the hyperpolarization phase of the action potential.

The refractory period is important in preventing the overlap of succeeding action potentials

Permits action potentials to jump directly from one node of Ranvier to the next

Permits action potentials to flow continuously under the myelin sheath

Allows electrotonic flow at the nodes of Ranvier

Permits action potentials to travel continuously along the entire axon

Allows saltatory conduction from one node of Ranvier to the next

Voltage gated Na+ channels recover at different rates and an action potential can be triggered by a strong stimulus

More voltage gated Na+ channels open and there is a lower threshold for action potentials

Voltage gated Na+ channels being to recover at different rates but not the voltage-gated K+ channels

Voltage gated K+ channels begin to recover at different rates and an action potential can be triggered by a strong stimulus

All Na+ channels are closed and no action potentials can be generated

Current flows from the active area of the membrane to the adjacent inactive area, thereby decreasing the potential in the inactive area to threshold

Saltatory conduction occurs in myelinated nerve fibers

Action potential propagation is faster in large diameter fibers than in small diameter ones

Action potential propagation is faster for strong stimuli than for weaker stimuli.

Action potential propagation is faster in myelinated fibers than in unmyelinated ones

4, 1, 2, 3

1, 2, 3, 4

3, 2, 1, 4

3, 4, 1, 2

2, 1, 4, 3

neurons with large diameter axons have shorter refractory periods

current can flow further electrotonically before an AP has to be regenerated

electrotonic current flow is faster in large diameter axons

large diameter axons have a higher density of voltage-gated Na⁺ channels

small diameter axons have a higher density of voltage-gated Na⁺ channels