all of the above

brains

spinal cord

a nerve

Purkinje neurons

pyramidal neurons

multipolar neurons

bipolar neurons

1 foot per second

100 miles per hour

1 meter per second

150 meters per second

proteins

electrical impulses

hormonal

telegraph

1 month

100 years

1 year

10 years

wire

the brain

muscle

nerve

skin cells

muscle cells

liver cells

stem cells

stem cells

muscle cells

prison cells

glial cells

they regenerate very quickly

they do not have a nucleus

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body