The muscle on the front of the thigh that extends the leg is the?

The muscle on the front of the thigh that extends the leg is the?

• A. Quadriceps femoris
• B. Hamstrings
• C. Rectus femoris
• D. Sartorius

Answer: (A)

The main idea here is knee extension on the front of the thigh. The quadriceps femoris is the large muscle group located on the front of the thigh whose primary action is to extend the knee, straightening the leg. It’s made up of four heads, including the rectus femoris, all working together to straighten the knee joint. The hamstrings are on the back of the thigh and flex the knee, not extend it, while the sartorius also crosses the thigh but mainly assists with knee and hip movements other than primary knee extension. So the muscle group responsible for extending the leg at the knee and located on the front of the thigh is the quadriceps femoris.

The main idea here is knee extension on the front of the thigh. The quadriceps femoris is the large muscle group located on the front of the thigh whose primary action is to extend the knee, straightening the leg. It’s made up of four heads, including the rectus femoris, all working together to straighten the knee joint. The hamstrings are on the back of the thigh and flex the knee, not extend it, while the sartorius also crosses the thigh but mainly assists with knee and hip movements other than primary knee extension. So the muscle group responsible for extending the leg at the knee and located on the front of the thigh is the quadriceps femoris.