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