hormonal

proteins

electrical impulses

telegraph

1 year

1 month

100 years

10 years

1 foot per second

100 miles per hour

150 meters per second

1 meter per second

bipolar neurons

Purkinje neurons

multipolar neurons

pyramidal neurons

spinal cord

brains

a nerve

all of the above

the brain

muscle

nerve

wire

liver cells

muscle cells

stem cells

skin cells

stem cells

glial cells

prison cells

muscle cells

they help carry oxygen to different parts of your body

they do not have a nucleus

they are very long compared to other cells in the body

they regenerate very quickly