Final answer:
In a normal multigated acquisition (MUGA) scan, the left ventricle will have the most mobility because it is the chamber responsible for pumping blood throughout the body and has the most powerful contractions.
Step-by-step explanation:
The question appears to be referencing a multigated acquisition (MUGA) scan, which is a type of nuclear medicine procedure used to assess the function of the heart's ventricles. In a normal MUGA scan, the area that will show the most mobility is the left ventricle. This is because the left ventricle is the chamber responsible for pumping oxygenated blood throughout the body, and it is the most muscular and powerful part of the heart. As a result, it exhibits the most movement during contraction when compared to the other heart chambers. Therefore, the left ventricle's vigorous contractions are emphasized on a MUGA scan, reflecting healthy cardiac function.