telegraph
electrical impulses
hormonal
proteins
brains
spinal cord
a nerve
all of the above
stem cells
muscle cells
skin cells
liver cells
glial cells
prison cells
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
100 miles per hour
150 meters per second
1 meter per second
1 foot per second
multipolar neurons
pyramidal neurons
Purkinje neurons
bipolar neurons
True or False: Damage to your nervous system can cause paralysis.
10 years
100 years
1 year
1 month
nerve
wire
muscle
the brain