100 miles per hour

1 meter per second

150 meters per second

1 foot per second

skin cells

muscle cells

stem cells

liver cells

telegraph

electrical impulses

proteins

hormonal

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

spinal cord

a nerve

all of the above

brains

pyramidal neurons

bipolar neurons

Purkinje neurons

multipolar neurons

prison cells

stem cells

glial cells

muscle cells

muscle

nerve

wire

the brain

1 month

1 year

100 years

10 years