In some cases, passing a drivers ed final exam can substitute for the written exam. No matter how the test is taken, students must pass with at least a 70% or higher, depending on that stateâs minimum. Once he or she passes, a teen driver will be issued a learners permit.
Learn how to protect your knees and reduce your risk of injury. The knee's vulnerability to injury depends on the strength of its neighboring muscles. A weak gluteus medius, or outer gluteal muscle, increases the chance of a knee injury by a factor of three. This muscle is critical for knee health, because it acts as a steering wheel for the entire leg.
The artificial components of a total knee replacement are referred to as the prosthesis. The posterior cruciate ligament is a tissue that normally stabilizes each side of the knee joint so that the lower leg cannot slide backward in relation to the thighbone.he knee is a hinge joint which provides motion at the point where the thigh meets the lower leg. The thighbone (or femur) abuts the large bone of the lower leg (tibia) at the knee joint. During a total knee replacement, the end of the femur bone is removed and replaced with a metal shell.