brains

all of the above

a nerve

spinal cord

electrical impulses

telegraph

hormonal

proteins

nerve

muscle

the brain

wire

skin cells

muscle cells

stem cells

liver cells

they are very long compared to other cells in the body

they do not have a nucleus

they regenerate very quickly

they help carry oxygen to different parts of your body

glial cells

prison cells

muscle cells

stem cells

bipolar neurons

multipolar neurons

pyramidal neurons

Purkinje neurons

150 meters per second

100 miles per hour

1 foot per second

1 meter per second

1 month

1 year

10 years

100 years