hormonal

electrical impulses

proteins

telegraph

100 years

1 month

10 years

1 year

nerve

wire

the brain

muscle

multipolar neurons

bipolar neurons

Purkinje neurons

pyramidal neurons

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

muscle cells

glial cells

prison cells

stem cells

all of the above

a nerve

brains

spinal cord

1 meter per second

100 miles per hour

150 meters per second

1 foot per second

muscle cells

stem cells

liver cells

skin cells