100 years

10 years

1 year

1 month

electrical impulses

telegraph

hormonal

proteins

muscle

wire

the brain

nerve

150 meters per second

1 meter per second

1 foot per second

100 miles per hour

brains

a nerve

spinal cord

all of the above

liver cells

muscle cells

stem cells

skin cells

prison cells

muscle cells

glial cells

stem cells

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

they regenerate very quickly

Purkinje neurons

pyramidal neurons

multipolar neurons

bipolar neurons