hormonal

proteins

electrical impulses

telegraph

1 foot per second

1 meter per second

100 miles per hour

150 meters per second

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

a nerve

spinal cord

brains

all of the above

stem cells

muscle cells

glial cells

prison cells

the brain

nerve

wire

muscle

100 years

1 year

10 years

1 month

pyramidal neurons

bipolar neurons

Purkinje neurons

multipolar neurons

stem cells

skin cells

muscle cells

liver cells