brains

all of the above

spinal cord

a nerve

1 foot per second

1 meter per second

150 meters per second

100 miles per hour

1 year

100 years

10 years

1 month

hormonal

electrical impulses

proteins

telegraph

bipolar neurons

multipolar neurons

Purkinje neurons

pyramidal neurons

muscle cells

stem cells

skin cells

liver cells

muscle cells

stem cells

prison cells

glial cells

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

they regenerate very quickly

they do not have a nucleus

muscle

wire

nerve

the brain