Which of the following bone tissues is adapted to support weight and withstand twisting stresses?

Choice A reason: Vastus medialis is part of the quadriceps group located in the anterior thigh. It functions in knee extension and does not belong to the hamstrings.

Choice B reason: Sartorius is a long, thin muscle that runs diagonally across the anterior thigh. It assists in hip and knee flexion but is not part of the hamstrings.

Choice C reason: Rectus femoris is another quadriceps muscle located in the front of the thigh. It helps extend the knee and flex the hip, but it is not a hamstring muscle.

Choice D reason: Biceps femoris is the correct answer. It is one of the three muscles that make up the hamstrings group, located in the posterior thigh. It functions in knee flexion and hip extension.

Choice E reason: Vastus lateralis is also part of the quadriceps group and contributes to knee extension. It is not a hamstring muscle.

Choice A reason: Hinge joints allow movement in one plane, such as flexion and extension. Examples include the elbow and knee, but the joint between the radius and ulna does not function this way.

Choice B reason: This is correct. The proximal radioulnar joint is a pivot joint, allowing rotational movement such as pronation and supination of the forearm. The radius rotates around the ulna, enabling the palm to turn up or down.

Choice C reason: Plane or gliding joints allow sliding movements between flat surfaces, such as those between carpal bones. This does not apply to the radius and ulna.

Choice D reason: Saddle joints allow movement in two planes and are found in the thumb (carpometacarpal joint). The radius and ulna do not form a saddle joint.

Choice E reason: Ball-and-socket joints allow movement in multiple directions and are found in the shoulder and hip. The radius and ulna do not form this type of joint.