1. A surgical instrument comprising: at least one grasping jaw configured for grasping a body tissue and including a shape memory alloy, said at least one grasping jaw being adapted to deliver surgical staples responsive to an actuation force; and a force generator mechanism that is contained within said at least one grasping jaw and said force generator mechanism being operably coupled to control circuitry, and a trigger operably coupled to the control circuitry, wherein said force generator mechanism is responsive to a signal generated by said trigger.