Neuron PhET

Observe the membrane closely while the axon is at rest. Which membrane channels are open? Choose all that apply

• K+ Leak

• Na+ Leak

• K+ Gated

• Na+ gated

Observe the membrane closely while the axon is at rest. Which membrane channels are closed?

• K+ Leak

• Na+ Leak

• K+ Gated

• Na+ Gated

The concentrations of sodium and potassium ions are different inside and outside the membrane. Which direction will sodium ions move as a result of facilitated diffusion through the “leak” channels? Potassium ions?

Which side of the neuron is negatively charged - inside the neuron or outside?

• Inside

• Outside

When membrane potential is negative, which side of the membrane is negatively charged?

• Inside

• Outside