telegraph
hormonal
proteins
electrical impulses
stem cells
muscle cells
prison cells
glial cells
wire
the brain
muscle
nerve
1 year
100 years
1 month
10 years
they do not have a nucleus
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
spinal cord
brains
all of the above
a nerve
bipolar neurons
multipolar neurons
Purkinje neurons
pyramidal neurons
liver cells
skin cells
1 foot per second
150 meters per second
1 meter per second
100 miles per hour
True or False: Damage to your nervous system can cause paralysis.