hormonal

proteins

telegraph

electrical impulses

100 years

1 month

1 year

10 years

brains

all of the above

spinal cord

a nerve

stem cells

prison cells

muscle cells

glial cells

they do not have a nucleus

they help carry oxygen to different parts of your body

they regenerate very quickly

they are very long compared to other cells in the body

multipolar neurons

Purkinje neurons

bipolar neurons

pyramidal neurons

1 foot per second

100 miles per hour

1 meter per second

150 meters per second

wire

the brain

nerve

muscle

liver cells

muscle cells

skin cells

stem cells