Movement - core: Quadriceps.

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Multiple Choice

Movement - core: Quadriceps.

Explanation:
The movement described is knee extension, which is primarily produced by the Quadriceps. These muscles sit on the front of the thigh and straighten the knee, providing the main power for actions like standing up from a squat, climbing stairs, and pushing off in running. They cross the knee joint, which is why they are the primary knee extensors. The Latissimus Dorsi powers arm pulling actions, the Deltoids move the shoulder, and the Gluteus Maximus extends the hip; none of these are the primary muscles responsible for extending the knee, so they don’t fit this movement.

The movement described is knee extension, which is primarily produced by the Quadriceps. These muscles sit on the front of the thigh and straighten the knee, providing the main power for actions like standing up from a squat, climbing stairs, and pushing off in running. They cross the knee joint, which is why they are the primary knee extensors. The Latissimus Dorsi powers arm pulling actions, the Deltoids move the shoulder, and the Gluteus Maximus extends the hip; none of these are the primary muscles responsible for extending the knee, so they don’t fit this movement.

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