Question

which muscle flexes the hip and does the opposite work of the gluteus maximus?
psoas major
pterygoid
deltoid
hamstring
trapezius

Explanation:

To solve this, we analyze each muscle:

• Psoas major: Flexes the hip. The gluteus maximus extends the hip, so psoas major does the opposite (flexion vs. extension) work.
• Pterygoid: Related to jaw movement, not hip.
• Deltoid: Shoulder muscle, not hip.
• Hamstring: Extends the hip (similar to gluteus maximus in extension role for hip, not opposite).
• Trapezius: Back/shoulder muscle, not hip.

So the muscle that flexes the hip and opposes gluteus maximus (which extends the hip) is psoas major.

Answer:

A. psoas major