electrical impulses

proteins

hormonal

telegraph

prison cells

glial cells

stem cells

muscle cells

muscle cells

liver cells

skin cells

stem cells

they regenerate very quickly

they help carry oxygen to different parts of your body

they do not have a nucleus

they are very long compared to other cells in the body

multipolar neurons

pyramidal neurons

Purkinje neurons

bipolar neurons

the brain

wire

nerve

muscle

1 month

1 year

10 years

100 years

all of the above

a nerve

spinal cord

brains

100 miles per hour

1 foot per second

1 meter per second

150 meters per second