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