a nerve

brains

all of the above

spinal cord

proteins

electrical impulses

hormonal

telegraph

10 years

1 month

100 years

1 year

stem cells

muscle cells

liver cells

skin cells

they do not have a nucleus

they regenerate very quickly

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

muscle

wire

the brain

nerve

muscle cells

stem cells

prison cells

glial cells

pyramidal neurons

Purkinje neurons

bipolar neurons

multipolar neurons

100 miles per hour

1 foot per second

1 meter per second

150 meters per second