all of the above

brains

a nerve

spinal cord

prison cells

muscle cells

stem cells

glial cells

hormonal

proteins

telegraph

electrical impulses

pyramidal neurons

Purkinje neurons

multipolar neurons

bipolar neurons

150 meters per second

1 foot per second

100 miles per hour

1 meter per second

skin cells

muscle cells

liver cells

stem cells

100 years

10 years

1 month

1 year

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

wire

nerve

muscle

the brain