100 years

10 years

1 year

1 month

100 miles per hour

1 foot per second

1 meter per second

150 meters per second

electrical impulses

telegraph

hormonal

proteins

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

pyramidal neurons

Purkinje neurons

multipolar neurons

bipolar neurons

skin cells

muscle cells

stem cells

liver cells

a nerve

brains

spinal cord

all of the above

prison cells

stem cells

muscle cells

glial cells

nerve

the brain

wire

muscle