Final answer:
When new muscle fibers are formed through hypertrophy, it takes time for motor neurons to connect to these new muscle cells and be able to control them.
Step-by-step explanation:
When new muscle fibers are formed through hypertrophy, it takes time for motor neurons to connect to these new muscle cells and be able to control them. The process of motor neurons connecting to new muscle fibers is called innervation. In general, the process of innervation can take several weeks or even months to complete, depending on factors such as the individual's age, the type of muscle being formed, and the extent of hypertrophy. During this time, the motor neurons extend their axons towards the new muscle fibers, form synapses at neuromuscular junctions, and establish the necessary connections to control the contractions of the muscle fibers.