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.
rapid depolarization - The change in membrane voltage potential which quickly triggers the action potential and contraction of cardiac muscle cells; the change is due to the opening of voltage-gated fast Na+ channels which allow Na+ ions to enter the cytoplasm causing the resting potential of -90 mV to change to +25 mV in the cell interior.