100 years

10 years

1 month

1 year

all of the above

spinal cord

brains

a nerve

glial cells

prison cells

stem cells

muscle cells

telegraph

hormonal

electrical impulses

proteins

bipolar neurons

pyramidal neurons

multipolar neurons

Purkinje neurons

they do not have a nucleus

they help carry oxygen to different parts of your body

they regenerate very quickly

they are very long compared to other cells in the body

nerve

wire

the brain

muscle

1 meter per second

100 miles per hour

150 meters per second

1 foot per second

stem cells

muscle cells

liver cells

skin cells