Final answer:
The correct answer to the question is a) Insertion; Origin. When a muscle contracts, it pulls on the tendon connected to the insertion and moves it toward the origin, which is fixed.
Step-by-step explanation:
Joint movements occur when a muscle contracts, pulling on the bone to which it is attached via tendons. The movable end where the muscle attaches to the bone being pulled is called the muscle's insertion, and the fixed end attached to a stabilized part of the skeleton is known as the origin. Therefore, when we consider the dynamic of muscular contraction and movement, we find that the insertion moves toward the origin.
The correct answer to the student's question is: a) Insertion; Origin.
A muscle contracts and the tension is transferred to the tendons, facilitating movement at the synovial joint, effectively moving the skeleton. Muscles responsible for the primary movement are termed prime movers, while those assisting are called synergists. A synergist that specifically stabilizes the insertion site is termed a fixator.