electrical impulses

telegraph

hormonal

proteins

150 meters per second

1 foot per second

100 miles per hour

1 meter per second

all of the above

a nerve

brains

spinal cord

they regenerate very quickly

they are very long compared to other cells in the body

they do not have a nucleus

they help carry oxygen to different parts of your body

stem cells

skin cells

liver cells

muscle cells

muscle cells

prison cells

glial cells

stem cells

muscle

wire

nerve

the brain

pyramidal neurons

Purkinje neurons

bipolar neurons

multipolar neurons

10 years

1 year

100 years

1 month