The bones involved in a hip replacement surgery include the pelvic bone and the

The Femoral Head would be the other bone.

Under most circumstances, hip replacement is actually more of a surgery involving the Neck and Head of the femur. The Neck and Head of the femur is relatively fragile in contract to the overall femur, and so is the part that will normally break in falls. Most of the time this is the parts that are replaced.

Normally the pelvic bone, where it is connected to the femur is merely smoothed, and debrided.

True because all jobs are different and they all have chemicals that are for cleaning

The person who utilize the progression principle will keep adding the difficulty of the exercise that he's doing, while the person who does not, will only stay stagnant.  the person that utilize progression principle, will get a stronger endurance because now his body is conditioned to do harsher routines.{the answer was already on verified)