Anatomy & Physiology Musculoskeletal #34
Which is the cause of muscle fatigue?
- Lack of protein
While many proteins contribute to the muscle’s ability to contract, muscle fatigue is not caused by a lack of protein.
- Lack of glucose
While glucose provides important fuel for muscle contraction, a lack of this substance is not the cause of muscle fatigue.
- Lack of magnesium sulfate (MgSO4)
While MgSO4 is believed to play a role in muscle relaxation, a lack of this substance is not the cause of muscle fatigue.
- Lack of adenosine triphosphate (ATP)
Muscle fatigue is the result of overstimulation of the muscles. It is caused by a lack of ATP within the body.
Muscle fatigue is defined as a decrease in power production in response to contractile activity.
Skeletal muscle contractions generate body heat because much of the body is composed of these muscles. Cells release a substance known as adenosine triphosphate (ATP) to supply energy for muscle contractions. Muscle fatigue occurs when a muscle cannot regenerate ATP.
Test Taking Tip
Consider the role of each choice in muscle movement to answer this question correctly.