proteins

hormonal

telegraph

electrical impulses

pyramidal neurons

Purkinje neurons

multipolar neurons

bipolar neurons

brains

spinal cord

a nerve

all of the above

prison cells

glial cells

muscle cells

stem cells

liver cells

muscle cells

skin cells

stem cells

they regenerate very quickly

they help carry oxygen to different parts of your body

they do not have a nucleus

they are very long compared to other cells in the body

100 years

10 years

1 year

1 month

muscle

wire

the brain

nerve

150 meters per second

100 miles per hour

1 meter per second

1 foot per second