proteins

telegraph

hormonal

electrical impulses

1 year

10 years

100 years

1 month

glial cells

prison cells

muscle cells

stem cells

all of the above

a nerve

spinal cord

brains

liver cells

skin cells

muscle cells

stem cells

they regenerate very quickly

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

they do not have a nucleus

150 meters per second

1 foot per second

100 miles per hour

1 meter per second

pyramidal neurons

Purkinje neurons

bipolar neurons

multipolar neurons

the brain

wire

nerve

muscle