hormonal

proteins

electrical impulses

telegraph

1 month

10 years

1 year

100 years

100 miles per hour

1 foot per second

1 meter per second

150 meters per second

glial cells

prison cells

muscle cells

stem cells

all of the above

a nerve

brains

spinal cord

they help carry oxygen to different parts of your body

they regenerate very quickly

they do not have a nucleus

they are very long compared to other cells in the body

liver cells

muscle cells

skin cells

stem cells

Purkinje neurons

multipolar neurons

bipolar neurons

pyramidal neurons

muscle

wire

nerve

the brain