proteins

hormonal

telegraph

electrical impulses

bipolar neurons

Purkinje neurons

pyramidal neurons

multipolar neurons

stem cells

glial cells

prison cells

muscle cells

150 meters per second

100 miles per hour

1 meter per second

1 foot per second

1 month

100 years

1 year

10 years

nerve

muscle

the brain

wire

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

they regenerate very quickly

skin cells

stem cells

muscle cells

liver cells

brains

a nerve

spinal cord

all of the above