Nerve impulse 2

The minimum stimulus needed to achieve an action potential is called the ______________ stimulus

At resting potential there is a high concentration of __________ ions outside and a high concentration of potassium ions inside the neuron.

During the absolute refractory period a second stimulus will produce a second action potential

• True

• False

During the relative refractory period the stimulus should be

• smaller than the previous one

• greater than the previous one

• same strength as the previous one

Action potential propagate to

• one direction

• both directions

Why is the action potential moving in a specific way? What happens to the previous adjacent area?

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A myelinated nerve fibre will have the ability to

• conduct impulses faster

• regenerate

• both

When the neuron is stimulated sodium ions rush into the axon along a _____________ ____ gradient

As the impulse progresses, the outflux of potassium ions cause the neuron to become _____________behind the impulse

Depolarisation occurs under the myelin

• True

• False