150 meters per second

1 meter per second

1 foot per second

100 miles per hour

proteins

hormonal

electrical impulses

telegraph

they regenerate very quickly

they are very long compared to other cells in the body

they do not have a nucleus

they help carry oxygen to different parts of your body

all of the above

brains

spinal cord

a nerve

muscle cells

stem cells

glial cells

prison cells

100 years

1 month

10 years

1 year

multipolar neurons

bipolar neurons

pyramidal neurons

Purkinje neurons

muscle

the brain

wire

nerve

stem cells

skin cells

muscle cells

liver cells