Which of the following pairs of terms is incorrect?

• A. Quadriceps: extensors
• B. Patella: knee
• C. Hamstring: antagonist
• D. Abductor: towards

Answer: (D)

Understanding limb movements and directional terms is key here. An abductor is a muscle that moves a limb away from the midline of the body. Saying an abductor moves “toward” the midline contradicts that meaning, so the pair abductor: toward is not correct.

The other pairs fit standard anatomical relationships: quadriceps are the primary knee extensors, so quadriceps: extensors is correct. The patella is the kneecap, located at the knee, so patella: knee is correct. The hamstrings act to flex the knee and, in the context of knee extension, oppose the quadriceps, making hamstrings: antagonist an appropriate relationship.