100 miles per hour

1 foot per second

1 meter per second

150 meters per second

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

they do not have a nucleus

they regenerate very quickly

hormonal

electrical impulses

telegraph

proteins

bipolar neurons

multipolar neurons

Purkinje neurons

pyramidal neurons

muscle cells

prison cells

stem cells

glial cells

all of the above

a nerve

brains

spinal cord

1 month

10 years

100 years

1 year

muscle cells

skin cells

liver cells

stem cells

the brain

wire

nerve

muscle