proteins

hormonal

electrical impulses

telegraph

the brain

nerve

muscle

wire

1 meter per second

100 miles per hour

150 meters per second

1 foot per second

prison cells

muscle cells

stem cells

glial cells

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

they do not have a nucleus

they regenerate very quickly

all of the above

brains

a nerve

spinal cord

100 years

10 years

1 year

1 month

skin cells

liver cells

stem cells

muscle cells

pyramidal neurons

multipolar neurons

Purkinje neurons

bipolar neurons