Neurons and Nerves

Question 1

Nervous system

Answer 1

A network of cells that carries information to and from all parts of the body

Question 2

Neuron

Answer 2

The specialized cell in the nervous system that receives and sends messages within that system

Question 3

Dendrites

Answer 3

“Tree-like” or “branch” of the neuron that receives messages from other cells

Question 4

Soma

Answer 4

The cell body that contains the nucleus and keeps the entire cell alive and functioning

Question 5

Axon

Answer 5

A fiber that carries messages out to other cells

Question 6

Axon terminals

Answer 6

The knobs on the end of the neuron that are responsible for communicating with other nerve cells

Question 7

Myelin

Answer 7

Fatty substance around the neuron

Question 8

Diffusion

Answer 8

The process of ions moving from areas of high concentration to areas of low concentration

Question 9

Resting potential

Answer 9

When the cell is at rest

Question 10

Action potential

Answer 10

When the cell is in action

Question 11

All-or-none

Answer 11

Neurons are either firing at full strength or not at all