Neuron Anatomy
What do axons do?
Carry signals away from the cell body.
What charge type does a neuron that is not sending signals have?
Negative
What is a nerve impulse?
How neurons communicate together.
What happens after the neuron has fired?
Enter into the refractory period where another action potential is not possible.
What is another name for sensory neurons?
Unipolar Neurons
What do dendrites do?
Carry signals toward the cell body.
Electrically charged atoms are known as what?
Ions
When a nerve impulse is sent out from a cell body what happens to the sodium channels?
They open.
What happens to the potassium and sodium channels during the refractory period?
The potassium channels reopen and the sodium channels close.
In the cerebellum.
How many positive charges does calcium contain?
Two
What happens when the sodium channels open?
The positive sodium molecules enter the cell.
What happens to the cell after the refractory period?
It enters its resting potential.
How many axons and dendrites do pyramidal neurons have?
One axon, and two dendrites.
Where are multipolar neurons found?
In the central nervous system.
Which ions are able to freely cross through the neuron's membrane while at rest?
Chloride Ions
What happens when the cell reaches a certain threshold of sodium?
An electrical signal is sent down the axon.
When is it possible for another action potential to occur?
After the neuron has officially 'recharged'.
What do neurotransmitters do?
How many axons and dendrites are a part of a bipolar neuron?
One axon and one dendrite.
What does resting potential refer to?
The difference between the voltage inside and outside the neuron.
Can a neuron partially fire?
What is another name for the main cell body of a neuron?
The soma