Nuerons

Which of the following is a neuron's job?

• to send information to other neurons

• to send information to your muscles

• to carry messages from your brain to your spinal cord

• all of the above

An incoming signal enters a neuron through its

• axon.

• myelin sheath.

• dendrites.

• soma.

What does the axon of a neuron do?

• protect the dendrites

• carry signals away from the soma

• insulate the myelin sheath

• process the information it receives

True or False: The axon of one neuron always touches the dendrites of another neuron.

• True

• False

What does the myelin sheath do?

• protect the soma

• carry signals into the dendrites

• insulate the axon

• process the information it receives

Neurotransmission can best be described as a(n)

• physical change.

• nuclear reaction.

• electrochemical process.

• electromagnetic field.

Neurotransmitters can best be described as

• electrical charges.

• chemical messengers.

• actions.

• reflexes.

True or False: A neuron's response is all-or-nothing.

• True

• False

What is a synapse?

• an electrical impulse

• the exact middle of a neuron

• a long string of many axons

• the gap between two neurons