100 years

1 year

1 month

10 years

all of the above

a nerve

spinal cord

brains

skin cells

liver cells

muscle cells

stem cells

the brain

nerve

wire

muscle

they help carry oxygen to different parts of your body

they do not have a nucleus

they regenerate very quickly

they are very long compared to other cells in the body

multipolar neurons

Purkinje neurons

pyramidal neurons

bipolar neurons

electrical impulses

hormonal

telegraph

proteins

stem cells

prison cells

muscle cells

glial cells

150 meters per second

1 meter per second

100 miles per hour

1 foot per second