Prevents movement by external forces ___Decelerates movement ___Causes the body part to move against gravity or external forces ___Joint angle changes in the direction of the applied muscle force ___Muscle gradually lessens in tension to control the descent of resistance ___ Accelerates movement ___Muscle force < resistance ___Muscle tension acts to maintain joint angle in stable position ___Muscle develops enough force to overcome applied resistance or gravity ___Joint angle changes in the direction of the resistance or external force ___Muscle force > resistance