electrical impulses

hormonal

telegraph

proteins

they regenerate very quickly

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

they do not have a nucleus

nerve

the brain

wire

muscle

1 year

1 month

100 years

10 years

stem cells

muscle cells

skin cells

liver cells

muscle cells

prison cells

glial cells

stem cells

Purkinje neurons

multipolar neurons

bipolar neurons

pyramidal neurons

all of the above

a nerve

spinal cord

brains

1 meter per second

1 foot per second

100 miles per hour

150 meters per second