all of the above

brains

spinal cord

a nerve

they are very long compared to other cells in the body

they do not have a nucleus

they regenerate very quickly

they help carry oxygen to different parts of your body

electrical impulses

telegraph

hormonal

proteins

wire

nerve

the brain

muscle

skin cells

muscle cells

liver cells

stem cells

glial cells

stem cells

prison cells

muscle cells

multipolar neurons

pyramidal neurons

bipolar neurons

Purkinje neurons

1 year

100 years

10 years

1 month

100 miles per hour

1 meter per second

1 foot per second

150 meters per second