hormonal

proteins

electrical impulses

telegraph

skin cells

liver cells

muscle cells

stem cells

100 years

1 year

10 years

1 month

spinal cord

all of the above

a nerve

brains

they are very long compared to other cells in the body

they regenerate very quickly

they help carry oxygen to different parts of your body

they do not have a nucleus

multipolar neurons

bipolar neurons

Purkinje neurons

pyramidal neurons

1 foot per second

1 meter per second

150 meters per second

100 miles per hour

muscle cells

prison cells

glial cells

stem cells

nerve

wire

the brain

muscle