hormonal

electrical impulses

telegraph

proteins

all of the above

spinal cord

a nerve

brains

liver cells

stem cells

skin cells

muscle cells

glial cells

muscle cells

stem cells

prison cells

pyramidal neurons

multipolar neurons

Purkinje neurons

bipolar neurons

1 year

100 years

10 years

1 month

wire

muscle

nerve

the brain

150 meters per second

100 miles per hour

1 foot per second

1 meter per second

they regenerate very quickly

they help carry oxygen to different parts of your body

they do not have a nucleus

they are very long compared to other cells in the body