Nervous System Quiz

The nerve impulse is an electrical current that travels along dendrites or axons.

• True 
• False

The area between the pre-synaptic cell and the post-synaptic cell is termed the synaptic cleft.

• True
• False

When a cell is at rest, the inside is more _____ and the outside is more ______. 

• negative; positive
• positive; negative 

The operation of the sodium-potassium "pump" moves: 

• sodium & potassium ions into the cell
• sodium & potassium ions out of the cell
• sodium ions into the cell & potassium ions out of the cell
• sodium ions into the cell & potassium ions out of the cell

After depolarization what happens to restore resting potential? 

• Sodium channels open & sodium ions diffuse out of the neuron.
• Potassium channels open & potassium ions diffuse into the neuron.
• Potassium channels open and potassium ions diffuse into the neuron.
• Sodium channels open and sodium ions diffuse into the neuron. 

Name the ion that is pumped into the axon to maintain resting potential. 

• Calcium
• Hydrogen
• Potassium 
• Sodium 

What describes the phase of quick entry of sodium ions into an axon during an action potential? 

• passive transport
• depolarization
• ion transport
• repolarization 

What generates a nerve impulse on the post-synaptic membrane? 

• Calcium binding with a receptor site
• Potassium leaking into the post-synaptic membrane 
• Neurotransmitter binding with receptor sites
• Neurotransmitter being removed from the synapse

The nucleus and most of the organelles in a neuron are located in the ______.

• dendrites
• axon
• cell body
• Schwann cells

For a neuron with a resting membrane potential at -70mv, an increase in the movement of sodium ions into the neuron's cytoplasm would result in:

• the depolarization of the neuron.
• the repolarization of the neuron 
• the replacement of potassium ions with sodium ions.
• the replacement of potassium ions with calcium ions.