spinal cord

a nerve

all of the above

brains

they are very long compared to other cells in the body

they regenerate very quickly

they help carry oxygen to different parts of your body

they do not have a nucleus

1 meter per second

1 foot per second

150 meters per second

100 miles per hour

muscle cells

skin cells

liver cells

stem cells

prison cells

stem cells

glial cells

muscle cells

multipolar neurons

Purkinje neurons

bipolar neurons

pyramidal neurons

the brain

wire

nerve

muscle

10 years

1 month

100 years

1 year

proteins

telegraph

electrical impulses

hormonal