proteins

hormonal

electrical impulses

telegraph

10 years

100 years

1 month

1 year

stem cells

liver cells

skin cells

muscle cells

Purkinje neurons

pyramidal neurons

bipolar neurons

multipolar neurons

they do not have a nucleus

they are very long compared to other cells in the body

they regenerate very quickly

they help carry oxygen to different parts of your body

brains

all of the above

a nerve

spinal cord

stem cells

prison cells

muscle cells

glial cells

wire

the brain

muscle

nerve

100 miles per hour

150 meters per second

1 meter per second

1 foot per second