proteins

hormonal

electrical impulses

telegraph

all of the above

spinal cord

a nerve

brains

pyramidal neurons

multipolar neurons

Purkinje neurons

bipolar neurons

1 year

1 month

10 years

100 years

they are very long compared to other cells in the body

they do not have a nucleus

they regenerate very quickly

they help carry oxygen to different parts of your body

liver cells

stem cells

muscle cells

skin cells

nerve

the brain

muscle

wire

glial cells

muscle cells

prison cells

stem cells

1 meter per second

1 foot per second

100 miles per hour

150 meters per second