Membrane potential

Which ion is found in a higher concentration inside a neuron than outside?

• Sodium

• Potassium

• Chloride

Which ion is found in a higher concentration outside a neuron than inside?

• Sodium

• Potassium

• proteins

The resting membrane potential is about...

• -70mV

• -50mV

• 35mV

• 70mV

During repolarization, which ion(s)moves outside of neuron?

• sodium

• potassium

• chlorine

At resting potential, the neuron is

• polarized
• depolarized
• repolarized

When the neuron is depolarized, which ion(s) is/are diffusing inside of the neuron?

• sodium

• potassium

• sodium and potassium

What causes depolarization of the neuron?

• sodium going into neuron
• sodium going out of neuron
• potassium going into neuron
• potassium going out of neuron

What is the charge inside of the neuron during action potential/depolarization?

• negative
• positive
• neutral

What is the correct steps of action potential?
1.  sodium ions diffuse inward; the membrane becomes depolarized
2.  sodium channels open
3. potassium ions diffuse outward while sodium is actively transported out of the cell; the membrane becomes repolarized
4. potassium channels open

• 2,1,4,3
• 1,2,3,4,
• 4,3,2,1,
• 3,2,4,1,

When a neuron is not engaged in an impulse.

• Resting potential
• Action potential
• Neural potential
• Synaptic potential