proteins

telegraph

electrical impulses

hormonal

a nerve

all of the above

spinal cord

brains

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

they regenerate very quickly

they do not have a nucleus

liver cells

stem cells

skin cells

muscle cells

multipolar neurons

Purkinje neurons

bipolar neurons

pyramidal neurons

100 years

1 month

10 years

1 year

glial cells

stem cells

muscle cells

prison cells

the brain

muscle

nerve

wire

1 meter per second

100 miles per hour

150 meters per second

1 foot per second