electrical impulses

hormonal

proteins

telegraph

stem cells

muscle cells

glial cells

prison cells

a nerve

brains

spinal cord

all of the above

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

bipolar neurons

multipolar neurons

Purkinje neurons

pyramidal neurons

100 years

1 year

10 years

1 month

nerve

wire

the brain

muscle

skin cells

liver cells

stem cells

muscle cells

1 meter per second

100 miles per hour

150 meters per second

1 foot per second