100 miles per hour

1 meter per second

150 meters per second

1 foot per second

electrical impulses

telegraph

hormonal

proteins

they do not have a nucleus

they regenerate very quickly

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

muscle

the brain

nerve

wire

all of the above

spinal cord

brains

a nerve

multipolar neurons

bipolar neurons

pyramidal neurons

Purkinje neurons

stem cells

muscle cells

prison cells

glial cells

liver cells

stem cells

muscle cells

skin cells

100 years

1 year

1 month

10 years