all of the above

spinal cord

brains

a nerve

Purkinje neurons

pyramidal neurons

bipolar neurons

multipolar neurons

proteins

electrical impulses

telegraph

hormonal

liver cells

skin cells

stem cells

muscle cells

they help carry oxygen to different parts of your body

they regenerate very quickly

they are very long compared to other cells in the body

they do not have a nucleus

stem cells

glial cells

prison cells

muscle cells

150 meters per second

1 foot per second

100 miles per hour

1 meter per second

wire

nerve

muscle

the brain

1 month

10 years

100 years

1 year