Final answer:
A muscle's origin is attached to a fixed or stabilized bone, while its insertion is attached to the bone being pulled. For example, during forearm flexion, the brachioradialis muscle assists in bending the elbow, with its insertion point on the radius bone and origin point on the humerus bone.
Step-by-step explanation:
A muscle's origin is the end of the muscle that is attached to a fixed or stabilized bone. On the other hand, a muscle's insertion is the end of the muscle that attaches to the bone being pulled. For example, during forearm flexion, the brachioradialis muscle assists the brachialis muscle in bending the elbow, and the brachioradialis muscle's insertion point is on the radius bone while its origin point is on the humerus bone.