hormonal

telegraph

proteins

electrical impulses

liver cells

skin cells

muscle cells

stem cells

brains

all of the above

a nerve

spinal cord

multipolar neurons

Purkinje neurons

pyramidal neurons

bipolar neurons

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

they do not have a nucleus

they regenerate very quickly

10 years

1 month

1 year

100 years

100 miles per hour

1 meter per second

1 foot per second

150 meters per second

prison cells

glial cells

stem cells

muscle cells

nerve

muscle

the brain

wire