hormonal

electrical impulses

proteins

telegraph

stem cells

liver cells

skin cells

muscle cells

1 year

100 years

10 years

1 month

multipolar neurons

bipolar neurons

pyramidal neurons

Purkinje neurons

the brain

wire

muscle

nerve

all of the above

a nerve

spinal cord

brains

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

they do not have a nucleus

they regenerate very quickly

1 meter per second

150 meters per second

100 miles per hour

1 foot per second

muscle cells

stem cells

glial cells

prison cells