Objective 17 Flashcards
0
Q
Explain how the number of muscle fibers stimulated affects the Force of Muscle Contraction
A
It affects the degree of motor unit recruitment
1
Q
What four things affect the force of Muscle Contraction?
A
- Number of muscle fibers stimulated
- Relative size (diameter) of the fibers
- Frequency of stimulation
- Degree of muscle stretch
2
Q
Explain how the relative size (diameter) of the muscle fibers affects the Force of Muscle Contraction
A
The bulkier the muscle, the greater its strength
3
Q
Explain how the frequency of stimulation affects Force of Muscle Contraction
A
The greater the frequency, the increase in tension
4
Q
Explain how the Degree of Muscle Stretch affects the Force of Muscle Contraction
A
Muscles contract strongest when muscle fibers at at 80% of their normal resting length or stretched over 100% (to about 120%)
