hormonal

proteins

electrical impulses

telegraph

muscle cells

stem cells

prison cells

glial cells

brains

a nerve

all of the above

spinal cord

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

they do not have a nucleus

10 years

100 years

1 year

1 month

bipolar neurons

pyramidal neurons

multipolar neurons

Purkinje neurons

wire

the brain

muscle

nerve

muscle cells

skin cells

stem cells

liver cells

1 meter per second

100 miles per hour

1 foot per second

150 meters per second