Answer:I am not.................
The lining of the spinal cord is called the "Dura". Dura is a meninge which is the top layer of protective covering for both the brain and the spinal cord.
The answer is B cell membrane
ALL CELLS NEED THIS TO PROTECT THEM!
When the electron wavefunction is bound in a stable state in an atom it stretches into a 'orbital' form. There was a mistake. When attached in a stable atomic state, an electron often acts like a three-dimensional oscillating wave, i.e. the orbital vibrates. It's sort of like a vibrating chord.