150 meters per second

100 miles per hour

1 meter per second

1 foot per second

muscle

wire

nerve

the brain

spinal cord

brains

a nerve

all of the above

they regenerate very quickly

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

they do not have a nucleus

1 month

10 years

100 years

1 year

stem cells

skin cells

muscle cells

liver cells

muscle cells

stem cells

glial cells

prison cells

multipolar neurons

Purkinje neurons

bipolar neurons

pyramidal neurons

telegraph

proteins

hormonal

electrical impulses