Final answer:
The rate of action potentials affects force production, as increased frequency leads to higher calcium levels and more forceful muscle contractions. It is also false that everyone has the same ratio of muscle fiber types.
Step-by-step explanation:
The statement that the rate at which action potentials are delivered to a Muscle Twitch Unit (MTU) has no influence on the force production is False. The primary variable determining force production is indeed the number of myofibers within the muscle that receive an action potential. However, the frequency of these action potentials can also increase the force production. This is because with higher frequencies, the amount of calcium increases, allowing more active cross-bridges to form in the myofibers and resulting in greater force production.
Moreover, it is also False that all people have the same proportion of slow-twitch to fast-twitch muscle fibers. The proportion of these fibers can vary widely among individuals and can be influenced by genetics, training, and other factors.