150 meters per second

1 meter per second

100 miles per hour

1 foot per second

multipolar neurons

pyramidal neurons

Purkinje neurons

bipolar neurons

stem cells

muscle cells

liver cells

skin cells

proteins

electrical impulses

hormonal

telegraph

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

the brain

wire

nerve

muscle

100 years

10 years

1 year

1 month

brains

a nerve

spinal cord

all of the above

muscle cells

prison cells

glial cells

stem cells