1. Which side of the axon is more positive before the action potential:

The inside
The outside

2. What causes diffusion?

The need of atoms to move to more empty areas
Atoms are pushed to more empty areas
Random movements of atoms and molecules

3. Which pair of charges will attract each other?


4. If the inside of the neurons is -30mV relative to the outside and the K+ ion channel is open, what will the K+ ion tend to do?

these ions will tend to exit, drawn by the like charges outside the neuron..
these ions will tend to exit because of the greater concentration of K+ on the inside of the axon.
they will tend to stay in the axon because the positive K+ ions will be drawn to the more negative inside of the axon.

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