Final answer:
Different motor units do not generate the same potentials in an EMG readout because they vary in size and the number of muscle fibers they control, resulting in different potentials.
Step-by-step explanation:
The statement that different motor units generate the same potentials in an EMG readout is false. Motor units in our muscles vary significantly in size and they control different numbers of muscle fibers. Smaller, lower-threshold motor units are activated first, producing less force, while larger, higher-threshold motor units are recruited for more forceful contractions. The electric potentials generated by these motor units during an EMG (Electromyography) test will vary depending on the size of the motor units and how many muscle fibers they control.
The process of recruiting different motor units is essential for various levels of force production, and it ensures that muscles can perform tasks ranging from very fine movements to powerful contractions. However, this also means that the electrical activity recorded on an EMG will show a range of potential differences based on which motor units are active at a given time.