Final answer:
Paralysis of the iliopsoas and rectus femoris would impair one's ability to flex the thigh. The largest muscle in the lower leg is the gastrocnemius, and extensor minimus longus is not a recognized muscle name.
Step-by-step explanation:
Paralysis of the iliopsoas and rectus femoris muscles would make an individual unable to flex the thigh. The iliopsoas is a deep muscle that allows for flexion at the hip joint, while the rectus femoris, part of the quadriceps group, also contributes to the flexion of the hip alongside its primary function of extending the knee.
Regarding the other options provided as reference information:
- The largest muscle in the lower leg is the gastrocnemius (b).
- The muscle name that does not make sense is extensor minimus longus (d) since it is not a recognized name for a muscle in human anatomy.
- The muscle that allows you to cross your legs is the piriformis (b), while the sartorius also assists in this action.
- Muscles that move the femur, tibia, and fibula are divided into compartments, where the quadriceps femoris, a group encompassing rectus femoris, the vastus lateralis, medialis, and intermedius, all primarily extend the knee, not flex the thigh.