Final answer:
The muscle primarily responsible for a particular movement is known as the prime mover or agonist.
Step-by-step explanation:
A muscle that is primarily responsible for creating a particular movement is called the prime mover or agonist for that movement. In any muscular action, while the prime mover is the main muscle causing movement, other muscles called synergists may assist in this action. Conversely, the muscle performing the opposite action of the prime mover is known as the antagonist. For instance, when lifting a cup, the biceps brachii acts as the prime mover with the assistance of the synergist muscle, brachialis. Additionally, some synergists also act as fixators, stabilizing the origin of the prime mover, allowing for more efficient movement.
The muscle primarily responsible for creating a particular movement is called the prime mover. It is also known as the agonist. Muscles that assist in the action of the prime mover are called synergists. Additionally, a muscle that stabilizes the bone and makes the insertion site more stable is called a fixator.