Final answer:
The function of alpha motoneurons is to contract the muscle fibers and generate tension for skeletal movement.
Step-by-step explanation:
The function of alpha motoneurons is to contract the muscle fibers and generate tension, which allows for skeletal movement. Alpha motoneurons innervate extra-fusal muscle fibers and are responsible for initiating and controlling muscle contractions. They connect to the muscle fibers at neuromuscular junctions and release acetylcholine, which triggers muscle contraction.