Jl is sitting in a chair wearing very heavy boots. she slowly straightens her leg, raising her boot is the type of contraction is an Isotonic contraction.
- Isotonic contractions are a type of contractions in which the muscle length changes.
- In Isotonic contractions there is increase in the muscle length and muscle movement but the tension remains constant.
- There are 2 types of Isotonic contraction they are eccentric and concentric contraction.
- Eccentric contraction occurs when the length of the muscle increases and concentric contraction when length of the muscle shortens.
- Skeletal muscle fibers Actin, Myosin and action potentials from the CNS at Neuro Muscular Junction(NMJ) mediates the contractions.
Thus, from the above points we can justify that the Isotonic contractions are responsible for the straightening of JL'S leg.
learn more about Isotonic contractions here:
https://brainly.com/question/18837727
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