hormonal

proteins

telegraph

electrical impulses

liver cells

skin cells

muscle cells

stem cells

the brain

nerve

wire

muscle

all of the above

brains

spinal cord

a nerve

they regenerate very quickly

they help carry oxygen to different parts of your body

they do not have a nucleus

they are very long compared to other cells in the body

glial cells

prison cells

muscle cells

stem cells

1 month

100 years

10 years

1 year

1 meter per second

150 meters per second

1 foot per second

100 miles per hour

multipolar neurons

pyramidal neurons

bipolar neurons

Purkinje neurons