proteins

electrical impulses

hormonal

telegraph

1 meter per second

100 miles per hour

150 meters per second

1 foot per second

Purkinje neurons

multipolar neurons

bipolar neurons

pyramidal neurons

they do not have a nucleus

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

they regenerate very quickly

muscle cells

stem cells

liver cells

skin cells

1 month

10 years

1 year

100 years

spinal cord

a nerve

brains

all of the above

muscle cells

stem cells

prison cells

glial cells

muscle

the brain

nerve

wire