all of the above

brains

spinal cord

a nerve

multipolar neurons

bipolar neurons

Purkinje neurons

pyramidal neurons

stem cells

prison cells

glial cells

muscle cells

they do not have a nucleus

they are very long compared to other cells in the body

they regenerate very quickly

they help carry oxygen to different parts of your body

1 year

1 month

10 years

100 years

100 miles per hour

1 meter per second

1 foot per second

150 meters per second

telegraph

electrical impulses

hormonal

proteins

muscle

the brain

nerve

wire

muscle cells

stem cells

skin cells

liver cells