proteins

telegraph

hormonal

electrical impulses

1 foot per second

100 miles per hour

150 meters per second

1 meter per second

stem cells

skin cells

muscle cells

liver cells

they are very long compared to other cells in the body

they regenerate very quickly

they help carry oxygen to different parts of your body

they do not have a nucleus

bipolar neurons

Purkinje neurons

multipolar neurons

pyramidal neurons

all of the above

brains

spinal cord

a nerve

100 years

1 year

10 years

1 month

prison cells

glial cells

muscle cells

stem cells

muscle

the brain

wire

nerve