Which motion is performed during hip and knee flexion?

The correct answer, which describes bending the knee and hip upward, is directly related to the movements involved in flexion of the hip and knee joints. Flexion is defined as the action of bending a joint, resulting in a decrease in the angle between the parts that comprise the joint. When flexing the hip and knee, the thigh moves closer to the abdomen while the lower leg moves towards the back of the thigh, thereby bending both joints upward.

This action is crucial in various activities, such as walking, where flexion aids in leg movement and clearance from the ground. Understanding this motion is essential for caregivers, as assisting patients with mobility often requires knowledge of basic joint movements. The other options describe different motions that do not align with the definition of flexion. For example, lengthening the leg, straightening the leg, and rotating the hip outward represent extension or rotation, not flexion. Recognizing these differences helps in delivering proper care and facilitating mobility in patients.