MUSCLE PHYSIOLOGY

Detailed explanation-1: -Answer and Explanation: The quadriceps are the prime movers of knee extension. The antagonist to knee extension is b) hamstrings. The quadriceps cause the action around the joint (returning the bones to the original position) and the hamstrings control the movement by lengthening and are therefore the antagonist.

Detailed explanation-2: -It is attached to the hip and helps to extend or raise the knee. This muscle is also used to flex the thigh.

Detailed explanation-3: -The muscles originate at the ischial tuberosity and insert at the medial surface of the tibial via a structure called the pes anserinus. The semimembranosus extends the thigh, flexes the leg, and medially rotates the leg when the knee is flexed.