150 meters per second

1 foot per second

1 meter per second

100 miles per hour

electrical impulses

hormonal

proteins

telegraph

muscle

wire

nerve

the brain

brains

all of the above

spinal cord

a nerve

1 year

1 month

100 years

10 years

bipolar neurons

multipolar neurons

Purkinje neurons

pyramidal neurons

they regenerate very quickly

they help carry oxygen to different parts of your body

they do not have a nucleus

they are very long compared to other cells in the body

stem cells

prison cells

glial cells

muscle cells

skin cells

stem cells

liver cells

muscle cells