electrical impulses

proteins

telegraph

hormonal

a nerve

brains

spinal cord

all of the above

muscle

the brain

wire

nerve

they are very long compared to other cells in the body

they regenerate very quickly

they do not have a nucleus

they help carry oxygen to different parts of your body

multipolar neurons

bipolar neurons

Purkinje neurons

pyramidal neurons

liver cells

muscle cells

stem cells

skin cells

prison cells

stem cells

muscle cells

glial cells

100 years

10 years

1 month

1 year

1 meter per second

100 miles per hour

150 meters per second

1 foot per second