proteins

electrical impulses

hormonal

telegraph

bipolar neurons

pyramidal neurons

multipolar neurons

Purkinje neurons

brains

a nerve

all of the above

spinal cord

they regenerate very quickly

they do not have a nucleus

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

liver cells

skin cells

muscle cells

stem cells

the brain

muscle

nerve

wire

glial cells

stem cells

muscle cells

prison cells

1 foot per second

100 miles per hour

1 meter per second

150 meters per second

1 month

1 year

100 years

10 years