Section 3
Control of Muscle Tension
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By Boundless
By Boundless
Boundless Anatomy and Physiology
Physiology
by Boundless
5 concepts
![Thumbnail](../../../../../../figures.boundless-cdn.com/21844/square/h-20tension-20relationship.jpg)
Force of Muscle Contraction
The force a muscle generates is dependent on its length and shortening velocity.
![Thumbnail](../../../../../../figures.boundless-cdn.com/32525/square/iuqcvqnwqd6s40azae1h.jpg)
Velocity and Duration of Muscle Contraction
The shortening velocity affects the amount of force generated by a muscle.
Motor Units
The motor unit is the functional unit of muscle contraction and includes the motor nerve fiber and the muscle fibers it innervates.
![Thumbnail](../../../../../../figures.boundless-cdn.com/31063/raw/sarcomere.jpg)
Muscle Tone
Muscle tone is a measure of a muscle's resistance to stretching while in a passive resting state.
Types of Muscle Contractions: Isotonic and Isometric
Muscle contractions are defined by changes in the length of the muscle during contraction.