When a cell is damaged the body will try to repair or replace the cell to continue normal functions. If a cell dies the body will remove it and replace it with another functioning cell, or fill the gap with connective tissue to provide structural support for the remaining cells.
Note: The American's with Disabilities Act does not prevent payment of parking meter fees by an individual with a disability. Therefore, you should verify requirements of feeding parking meters and the time limit allowed in the jurisdiction you are visiting.
No you do not have to pay the meter... no one has to pay the meter.... BUT! you can enjoy paying the parking fine when you receive one. You handicap sign will not keep you from getting the ticket. No, you still have to pay the meter even if you're parking in a handicapped spot. Check with your city hall. My father purchased a parking meter exemption sign for handicapped drivers which he hangs on his mirror, same way as his 'handcapped' sign. Otherwise he would have to put money in the meters.