Final answer:
The semitendinosus muscle is a synergist to the semimembranosus muscle. The gastrocnemius is the largest muscle in the lower leg. Muscles that move the leg away from the body are called abductors.
Step-by-step explanation:
The semitendinosus muscle is a synergist to the semimembranosus muscle. A synergist muscle helps an agonist work effectively by aiding or modifying the action. In this case, both the semitendinosus and semimembranosus muscles work together to flex the knee and extend the hip.
Speaking of muscle functions, the largest muscle in the lower leg is the gastrocnemius. In terms of muscle names that don't make sense, 'extensor minimus longus' does not align with typical anatomical terminology as muscles are generally not referred to as 'minimus longus'. Lastly, a muscle that moves the leg away from the body is termed an abductor.