10 years

1 year

100 years

1 month

all of the above

a nerve

brains

spinal cord

1 foot per second

150 meters per second

100 miles per hour

1 meter per second

stem cells

skin cells

muscle cells

liver cells

proteins

electrical impulses

telegraph

hormonal

the brain

muscle

wire

nerve

they regenerate very quickly

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

they do not have a nucleus

bipolar neurons

multipolar neurons

pyramidal neurons

Purkinje neurons

glial cells

stem cells

muscle cells

prison cells