electrical impulses

proteins

hormonal

telegraph

1 foot per second

150 meters per second

100 miles per hour

1 meter per second

liver cells

muscle cells

skin cells

stem cells

glial cells

muscle cells

prison cells

stem cells

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

the brain

wire

nerve

muscle

10 years

1 year

1 month

100 years

Purkinje neurons

multipolar neurons

pyramidal neurons

bipolar neurons

a nerve

brains

spinal cord

all of the above