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Which of the following are barriers to entry into a market:
Antagonistic Muscle
Pairs of muscles that work against each other to move body parts, such as the biceps and triceps for arm movement.
Quadriceps Femoris Group
A group of four muscles located in the front of the thigh, responsible for extending the leg at the knee joint.
Gastrocnemius
A major calf muscle that plays a crucial role in walking, running, and jumping.
Myofibril
Specific muscle cell organelle containing a linear arrangement of sarcomeres, which shorten to produce muscle contraction.
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