liver cells

skin cells

muscle cells

stem cells

a nerve

brains

spinal cord

all of the above

telegraph

hormonal

proteins

electrical impulses

150 meters per second

1 foot per second

1 meter per second

100 miles per hour

bipolar neurons

pyramidal neurons

multipolar neurons

Purkinje neurons

1 year

1 month

100 years

10 years

they regenerate very quickly

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

they do not have a nucleus

glial cells

prison cells

stem cells

muscle cells

muscle

wire

nerve

the brain