proteins

hormonal

telegraph

electrical impulses

they do not have a nucleus

they regenerate very quickly

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

1 meter per second

1 foot per second

150 meters per second

100 miles per hour

muscle cells

prison cells

stem cells

glial cells

bipolar neurons

multipolar neurons

pyramidal neurons

Purkinje neurons

skin cells

stem cells

liver cells

muscle cells

all of the above

brains

spinal cord

a nerve

nerve

wire

muscle

the brain

1 month

10 years

1 year

100 years