electrical impulses

proteins

hormonal

telegraph

multipolar neurons

Purkinje neurons

bipolar neurons

pyramidal neurons

muscle cells

stem cells

skin cells

liver cells

1 month

10 years

100 years

1 year

they regenerate very quickly

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

they do not have a nucleus

glial cells

muscle cells

prison cells

stem cells

wire

muscle

the brain

nerve

spinal cord

all of the above

brains

a nerve

1 meter per second

100 miles per hour

150 meters per second

1 foot per second