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.
The opening and closing of ion channels can induce a departure from the resting potential. This is called a depolarization if the interior voltage becomes less negative (say from â70 mV to â60 mV), or a hyperpolarization if the interior voltage becomes more negative (say from â70 mV to â80 mV).