Ground-Glass Nodules: If Growing, Assume Cancer. Blair Westerly, MD. The more CT scans that are performed, the more ground-glass opacities (GGOâs) are seen and what to do with these abnormalities can be difficult to ascertain for clinicians.
the process of reversing the charge across a cell membrane (usually a NEURON), so causing an ACTION POTENTIAL. In depolarization, the inside of the membrane, which is normally negatively charged, becomes positive and the outside negative.
Nerve cells at rest have an electrical charge across their membranes: the outside of the cell is positively charged and the inside of the cell is negatively charged. Depolarization occurs when the nerve cell reverses these charges; to change them back to an at-rest state, the neuron sends another electrical signal. The entire process occurs when the cell allows specific ions to flow into and out of the cell.