The other person could be peer pressuring you and an internal factor could be a chemical in your brain
The Femoral Head would be the other bone.
The two types of information that can be stored in long-term memory are explicit and implicit memories. Explicit memories are specific to facts and events, such as a your wedding or continents on a map. Implicit memories are specific to procedures and conditioned responses, such as riding a bike or feeling happy when your favorite song plays.