Neuron and Action Potential Quiz

What part of the neuron receives incoming signals?

• Axon Terminal

• Cell Body

• Dendrites

• Axon

What is the phenomenon called when a neuron fires?

• Depolarization

• Repolarization

• Graded Potential

• Action Potential

What is the resting potential of a typical neuron?

• Minus 70 millivolts

• Plus 50 millivolts

• Minus 30 millivolts

• Zero millivolts

Which ion rushes into the cell during depolarization?

• Potassium

• Chloride

• Sodium

• Calcium

What is the period of time when a nerve cannot fire another action potential?

• Hyperpolarization

• Depolarization

• Absolute Refractory Period

• Relative Refractory Period

What contributes to increasing conduction velocity of action potentials?

• Ligand-gated Ion Channels

• Voltage-gated Sodium Channels

• Graded Potentials

• Myelin Sheaths

What is the process called when the membrane potential becomes less negative and more positive?

• Overshoot

• Depolarization

• Repolarization

• Hyperpolarization

Which ion channels open when the membrane potential reaches a certain value?

• Ligand-gated Ion Channels

• Always-open Ion Channels

• Mechanically-gated Ion Channels

• Voltage-gated Ion Channels

What is the structure that actively transports ions across the membrane against their concentration gradient?

• Ion Channel

• Dendrite

• Sodium-Potassium Pump

• Axon Terminal

What is the point where the cell has achieved electrochemical equilibrium?

• Membrane Potential

• Action Potential

• Graded Potential

• Resting Potential