proteins

electrical impulses

hormonal

telegraph

muscle cells

stem cells

skin cells

liver cells

prison cells

glial cells

stem cells

muscle cells

1 foot per second

1 meter per second

150 meters per second

100 miles per hour

wire

nerve

the brain

muscle

Purkinje neurons

multipolar neurons

bipolar neurons

pyramidal neurons

100 years

10 years

1 year

1 month

they do not have a nucleus

they regenerate very quickly

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

brains

a nerve

spinal cord

all of the above