electrical impulses

telegraph

hormonal

proteins

muscle cells

skin cells

liver cells

stem cells

1 foot per second

150 meters per second

1 meter per second

100 miles per hour

multipolar neurons

pyramidal neurons

Purkinje neurons

bipolar neurons

stem cells

prison cells

muscle cells

glial cells

100 years

1 month

1 year

10 years

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

all of the above

spinal cord

brains

a nerve

the brain

muscle

nerve

wire