Nerve Cells--Action Potential

​Action Potential in Nerve Cells

Multiple Choice

Nerves cells are ________ compared with their surrounding environment.

• positive

• negative

• neutral

• ionized

​Watch the 2 minute video

on the next slide

​Action Potential in Nerve Cells

Multiple Choice

When an action potential travels down an axon,

the next segment of the neuron becomes ______,

while the previous segment is returning to ______.

• positive, negative

• negative, positive

Drag and Drop

If a nerve cell receives a stimulus above ​

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, it will initiate an ​

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. Nerve cells are ​

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at rest. First, ​

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ions rush in to make the cell more positive on the inside. Then ​

Placeholder

ions leave the cell to repolarize or return it back to its usual negative state.

Drag these tiles and drop them in the correct blank above

threshold

action potential

negative

sodium

potassium

Here is another image to help you understand how a nerve impulse is propogated down an axon.

Labelling

Label the diagram:

Drag labels to their correct position on the image

Depolarization-(Na+)rushes in

Resting potential

Repolarization- (K+) out

threshold

Hyperpolarization

Back to resting pot.