10 years

1 month

1 year

100 years

all of the above

spinal cord

a nerve

brains

bipolar neurons

pyramidal neurons

Purkinje neurons

multipolar neurons

150 meters per second

1 meter per second

1 foot per second

100 miles per hour

the brain

muscle

wire

nerve

skin cells

liver cells

stem cells

muscle cells

they regenerate very quickly

they are very long compared to other cells in the body

they do not have a nucleus

they help carry oxygen to different parts of your body

telegraph

hormonal

proteins

electrical impulses

muscle cells

prison cells

stem cells

glial cells