hormonal

proteins

electrical impulses

telegraph

100 miles per hour

1 foot per second

1 meter per second

150 meters per second

brains

spinal cord

all of the above

a nerve

skin cells

muscle cells

stem cells

liver cells

wire

the brain

muscle

nerve

pyramidal neurons

Purkinje neurons

multipolar neurons

bipolar neurons

glial cells

muscle cells

prison cells

stem cells

1 month

1 year

10 years

100 years

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