a nerve

spinal cord

all of the above

brains

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

they regenerate very quickly

they do not have a nucleus

stem cells

liver cells

muscle cells

skin cells

1 year

10 years

100 years

1 month

electrical impulses

hormonal

telegraph

proteins

muscle

the brain

wire

nerve

pyramidal neurons

Purkinje neurons

multipolar neurons

bipolar neurons

150 meters per second

1 meter per second

1 foot per second

100 miles per hour

glial cells

stem cells

prison cells

muscle cells