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