telegraph

electrical impulses

proteins

hormonal

skin cells

muscle cells

stem cells

liver cells

spinal cord

brains

all of the above

a nerve

1 foot per second

1 meter per second

100 miles per hour

150 meters per second

100 years

10 years

1 month

1 year

nerve

muscle

wire

the brain

they regenerate very quickly

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

prison cells

glial cells

stem cells

muscle cells

Purkinje neurons

pyramidal neurons

multipolar neurons

bipolar neurons