all of the above

a nerve

brains

spinal cord

pyramidal neurons

bipolar neurons

Purkinje neurons

multipolar neurons

telegraph

hormonal

proteins

electrical impulses

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

they do not have a nucleus

they regenerate very quickly

100 miles per hour

1 meter per second

1 foot per second

150 meters per second

prison cells

glial cells

stem cells

muscle cells

10 years

100 years

1 month

1 year

the brain

muscle

wire

nerve

muscle cells

stem cells

liver cells

skin cells