a nerve

all of the above

brains

spinal cord

1 meter per second

150 meters per second

1 foot per second

100 miles per hour

electrical impulses

proteins

hormonal

telegraph

they do not have a nucleus

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

nerve

wire

muscle

the brain

stem cells

prison cells

muscle cells

glial cells

pyramidal neurons

bipolar neurons

multipolar neurons

Purkinje neurons

liver cells

stem cells

muscle cells

skin cells

10 years

1 month

1 year

100 years