hormonal

electrical impulses

telegraph

proteins

brains

all of the above

a nerve

spinal cord

pyramidal neurons

multipolar neurons

bipolar neurons

Purkinje neurons

nerve

wire

muscle

the brain

100 years

10 years

1 year

1 month

they help carry oxygen to different parts of your body

they do not have a nucleus

they regenerate very quickly

they are very long compared to other cells in the body

150 meters per second

1 meter per second

100 miles per hour

1 foot per second

stem cells

skin cells

liver cells

muscle cells

muscle cells

stem cells

prison cells

glial cells