a muscle fiber generates maximum contractile force when: course hero

What was the maximum force generated in this experiment?

The maximum force generated in this experiment was 0.264 gf.

Why does the force of contraction change with muscle fiber length?

As the muscle length is increased, the active force developed reaches a maximum and then decreases. This maximum point is the length at which the heart normally functions. As with skeletal muscle, changes in length alter the active force by varying the degree of overlap of the thick myosin and thin actin filaments.

What structure is stimulated to cause a muscle contraction?

A Muscle Contraction Is Triggered When an Action Potential Travels Along the Nerves to the Muscles. Muscle contraction begins when the nervous system generates a signal. The signal, an impulse called an action potential, travels through a type of nerve cell called a motor neuron.

How does increasing stimulation frequency affect force production?

From Fig. 3, it is evident that as fatigue gets greater, the force–frequency relationship becomes more and more flat; any increase in stimulation frequency increases the force output to a smaller extent than in less fatigued states.Jul 14, 2020

Do larger muscles produce more force?

With regards to a muscle, the larger the moment it can produce, the stronger you are. When muscles increase in size, the amount of force they can produce also increases – this is well known and accepted. Obviously a larger muscle will be able to produce more force than a much smaller muscle.Nov 30, 2015

What factors within a muscle fiber affect the production of force?

The more cross-links formed, the stronger the force of contraction. Therefore, the force of contraction depends upon the amount of actin and myosin available and thus on the number of fibers a muscle contains. In other words, the force of contraction is related to a muscle's size [67,126].

What happens to muscle fibers during contraction?

When signaled by a motor neuron, a skeletal muscle fiber contracts as the thin filaments are pulled and then slide past the thick filaments within the fiber's sarcomeres. This process is known as the sliding filament model of muscle contraction ([link]).

How does a muscle fiber contract?

Summary. According to the sliding filament theory, a muscle fiber contracts when myosin filaments pull actin filaments closer together and thus shorten sarcomeres within a fiber. When all the sarcomeres in a muscle fiber shorten, the fiber contracts.Mar 5, 2021

What is a muscle fiber quizlet?

Muscle Fiber. A cylindrical cell composed of numerous myofibrils that contracts when stimulated. Contraction.

How do muscles increase force?

The increase in force that occurs with increased firing rate reflects the summation of successive muscle contractions: The muscle fibers are activated by the next action potential before they have had time to completely relax, and the forces generated by the temporally overlapping contractions are summed (Figure 16.7).

What is needed for muscles to produce greater force?

The force generated by a muscle depends on the number of actin and myosin cross-bridges formed; a larger number of cross-bridges results in a larger amount of force.Aug 13, 2020

Does the type of muscle Fibre change with contraction force?

The contractile properties of muscle fibers vary between fiber types,8,12 so it is likely that the force developed by a whole muscle depends on the recruitment patterns and contractile properties of the different fibers within it.Feb 17, 2012