hormonal

telegraph

proteins

electrical impulses

the brain

wire

muscle

nerve

Purkinje neurons

bipolar neurons

multipolar neurons

pyramidal neurons

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

a nerve

brains

all of the above

spinal cord

100 years

1 month

10 years

1 year

stem cells

muscle cells

glial cells

prison cells

skin cells

muscle cells

stem cells

liver cells

1 foot per second

100 miles per hour

150 meters per second

1 meter per second