117k views
3 votes
The more slowly a skeletal muscle is stimulated, the greater its exerted force becomes?

1) True
2) False

User Brogrammer
by
8.1k points

1 Answer

3 votes

Final answer:

The statement is false because muscle force does not increase by merely stimulating the muscle more slowly. Force is influenced by factors like muscle fiber type, length-tension relationship, and motor unit recruitment.

Step-by-step explanation:

The statement that 'the more slowly a skeletal muscle is stimulated, the greater its exerted force becomes' is false. The force a muscle exerts does not increase simply by slowing down the rate at which the muscle is stimulated. Instead, the force a muscle can exert is affected by various factors, including the types of muscle fibers involved (slow-twitch or fast-twitch), the length-tension relationship, and the recruitment of multiple motor units. The length-tension relationship describes how the number of cross-bridges that can form during contraction affects the force generated. Muscles contract most strongly when muscle fibers are at an optimal length before contraction begins. Stimulating a muscle more slowly doesn't inherently lead to greater force.

In addition, the force of a muscle contraction can increase via the recruitment of more motor units, which is a process regulated by the central nervous system in response to the demand placed upon the muscle. The phenomenon of treppe, or the "staircase effect," also illustrates that a muscle's subsequent contractions may be stronger than the initial ones after a period of rest, but this is not a result of the rate of stimulation. The statement is true. The more slowly a skeletal muscle is stimulated, the greater its exerted force becomes. This is due to a phenomenon called treppe, where muscle contractions become more efficient after a period of dormancy. During treppe, initially, the muscle generates about one-half the force of later contractions, resulting in a graded increase in muscle tension.

User Sheileen
by
8.3k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.