150 meters per second

1 foot per second

100 miles per hour

1 meter per second

the brain

nerve

wire

muscle

brains

all of the above

a nerve

spinal cord

muscle cells

liver cells

stem cells

skin cells

multipolar neurons

bipolar neurons

Purkinje neurons

pyramidal neurons

telegraph

proteins

hormonal

electrical impulses

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

100 years

10 years

1 month

1 year

muscle cells

prison cells

glial cells

stem cells