The Board of the Philadelphia Parking Authority has changed the time for the regularly scheduled Board Meetings for 2017. Each Board Meeting will now be held at 10:00 am in the Board Room of the Authorityâs Headquarters, 701 Market Street, Suite 5400, Philadelphia, PA 19106.
A hyperpolarization or depolarization event may simply produce a graded potential, a smallish change in the membrane potential that is proportional to the size of the stimulus.
depolarizing currents established by the influx of Na+ flow down the axon and trigger an action potential at the next segment. The Na+ diffusing into the axon during the first phase of the action potential creates a depolarizing current that brings the next segment, or node, of the axon to threshold.