Which are extensors of the knee joint?
A)rectus femoris,biceps femoris,quadratus femoris
B)sartorius,gracilis,semitendinosus
C)semitendinosus,semimembranosus,gastrocnemius
D)vastus lateralis,rectus femoris,vastus medialis

Question

Quizplus · Accepted Answer

The extensors of the knee joint are the muscles that help to straighten the leg at the knee joint. The vastus lateralis, rectus femoris, and vastus medialis are the three muscles that constitute the quadriceps muscle group, which is primarily responsible for knee extension. Therefore, option D is the best choice. Option A includes muscles that flex the hip joint, not extend the knee joint. Option B includes muscles that contribute to both hip and knee flexion, but not extension. Option C includes muscles that primarily plantarflex the ankle joint, not extend the knee joint.

Which Are Extensors of the Knee Joint