100 miles per hour

1 meter per second

1 foot per second

150 meters per second

electrical impulses

hormonal

proteins

telegraph

a nerve

spinal cord

brains

all of the above

skin cells

stem cells

liver cells

muscle cells

they regenerate very quickly

they do not have a nucleus

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

multipolar neurons

bipolar neurons

pyramidal neurons

Purkinje neurons

muscle cells

glial cells

stem cells

prison cells

nerve

wire

muscle

the brain

1 year

100 years

10 years

1 month