pyramidal neurons

bipolar neurons

multipolar neurons

Purkinje neurons

hormonal

telegraph

proteins

electrical impulses

10 years

1 year

100 years

1 month

stem cells

muscle cells

liver cells

skin cells

spinal cord

a nerve

all of the above

brains

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

the brain

wire

muscle

nerve

1 meter per second

150 meters per second

1 foot per second

100 miles per hour

stem cells

prison cells

muscle cells

glial cells