telegraph

proteins

electrical impulses

hormonal

they are very long compared to other cells in the body

they regenerate very quickly

they do not have a nucleus

they help carry oxygen to different parts of your body

the brain

wire

muscle

nerve

1 year

100 years

1 month

10 years

stem cells

muscle cells

skin cells

liver cells

muscle cells

prison cells

stem cells

glial cells

brains

spinal cord

a nerve

all of the above

1 meter per second

100 miles per hour

1 foot per second

150 meters per second

multipolar neurons

pyramidal neurons

bipolar neurons

Purkinje neurons