Neuro Quiz #2 Nerve Impulses and Synapse

When a neuron is at rest, the inside of the neuron has what kind of charge?

• positive
• negative

During depolarization, a neuron is stimulated and what ion rushes into the neuron to reverse the charges?

• sodium
• potassium

The area where 2 neurons meet.

• axon
• dendrite
• synapse
• sodium- potassium pump

Which of the following best describes REPOLARIZATION?

• sodium rushes inside the cell making the inside more positive
• potassium moves out of the neuron making the inside more negative
• neurotransmitters move the signal down the axon
• myelin sheath develop to protect the signal moving down the neuron

What two ions are involved in the electrical nerve impulse?

• iodine and sodium
• sodium and potassium
• iron and sodium
• calcium and iodine

When does a stimuli cause an action potential?

• when it reaches threshold
• just below the threshold
• just above threshold

During depolarization outsidd of the cell is ______________ charged and the inside of the cell is ______________ charged.

• negatively/positively
• positively/negatively
• positively/positively
• negatively/negatively

Before an action potential can move to the next neuron, it must release

• sodium into the synapse
• positive protons into the synapse
• neurotransmitters into the synapse
• negative electrons into the synapse

The tiny gap between neurons where nerve impulses are sent from one neuron to another. It is where communication occurs between an axon and dendrite

• synapse
• axon terminal
• impulse
• myelin

Chemicals that send messages from the axon terminal across the synapse from neuron to neuron are called what?

• neurons
• dendrites
• bipolar
• neurotransmitters