True because how else would we survive on Earth?
The nervous system is made up of the brain, spinal cord and nerves. The spinal cord helps carry messages or signals back and forth between your body and brain.
Hope this helped!
<span>The motor unit that is activated first and takes less energy is classified as low-threshold. The motor unit that is activated second and takes more energy is classified as high threshold. Sol lifting the labbook and placing it in the book bag simulates more motore units.</span>
