150 meters per second

1 meter per second

1 foot per second

100 miles per hour

brains

a nerve

all of the above

spinal cord

prison cells

stem cells

glial cells

muscle cells

nerve

the brain

wire

muscle

pyramidal neurons

multipolar neurons

Purkinje neurons

bipolar neurons

liver cells

skin cells

stem cells

muscle cells

they regenerate very quickly

they do not have a nucleus

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

electrical impulses

proteins

telegraph

hormonal

100 years

10 years

1 year

1 month