electrical impulses

hormonal

proteins

telegraph

stem cells

liver cells

skin cells

muscle cells

brains

a nerve

all of the above

spinal cord

the brain

nerve

wire

muscle

bipolar neurons

multipolar neurons

pyramidal neurons

Purkinje neurons

100 years

1 year

10 years

1 month

prison cells

stem cells

muscle cells

glial 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

100 miles per hour

150 meters per second

1 foot per second

1 meter per second