telegraph

proteins

hormonal

electrical impulses

they do not have a nucleus

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

spinal cord

brains

a nerve

all of the above

100 years

1 month

10 years

1 year

muscle

nerve

wire

the brain

muscle cells

liver cells

skin cells

stem cells

prison cells

glial cells

stem cells

muscle cells

100 miles per hour

150 meters per second

1 meter per second

1 foot per second

bipolar neurons

multipolar neurons

Purkinje neurons

pyramidal neurons