a nerve

spinal cord

all of the above

brains

telegraph

hormonal

electrical impulses

proteins

liver cells

stem cells

muscle cells

skin cells

stem cells

prison cells

muscle cells

glial cells

10 years

1 month

100 years

1 year

pyramidal neurons

multipolar neurons

bipolar neurons

Purkinje neurons

1 meter per second

100 miles per hour

1 foot per second

150 meters per second

wire

the brain

muscle

nerve

they regenerate very quickly

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

they do not have a nucleus