brains

all of the above

a nerve

spinal cord

100 years

10 years

1 year

1 month

electrical impulses

hormonal

proteins

telegraph

muscle cells

prison cells

glial cells

stem cells

bipolar neurons

Purkinje neurons

pyramidal neurons

multipolar neurons

100 miles per hour

1 meter per second

1 foot per second

150 meters per second

the brain

nerve

wire

muscle

stem cells

liver cells

muscle cells

skin cells

they regenerate very quickly

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

they do not have a nucleus