all of the above

a nerve

spinal cord

brains

1 month

100 years

1 year

10 years

proteins

telegraph

hormonal

electrical impulses

skin cells

liver cells

muscle cells

stem cells

100 miles per hour

1 meter per second

1 foot per second

150 meters per second

nerve

wire

the brain

muscle

they regenerate very quickly

they do not have a nucleus

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

muscle cells

glial cells

prison cells

stem cells

multipolar neurons

bipolar neurons

Purkinje neurons

pyramidal neurons