electrical impulses

telegraph

hormonal

proteins

glial cells

prison cells

muscle cells

stem cells

liver cells

muscle cells

skin cells

stem cells

the brain

muscle

nerve

wire

they do not have a nucleus

they regenerate very quickly

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

Purkinje neurons

multipolar neurons

bipolar neurons

pyramidal neurons

1 month

10 years

100 years

1 year

1 foot per second

1 meter per second

150 meters per second

100 miles per hour

all of the above

spinal cord

a nerve

brains