brains

spinal cord

a nerve

all of the above

wire

nerve

the brain

muscle

skin cells

muscle cells

stem cells

liver cells

proteins

hormonal

electrical impulses

telegraph

100 miles per hour

1 foot per second

150 meters per second

1 meter per second

glial cells

stem cells

muscle cells

prison cells

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

they regenerate very quickly

1 year

10 years

1 month

100 years

pyramidal neurons

multipolar neurons

Purkinje neurons

bipolar neurons