Muscle fatigue results due to deficiency of _ and excess accumulation of _.
Correct answer: A. Adenosine triphosphate, Lactic acid
- A. Adenosine triphosphate, Lactic acid
- B. Adenosine triphosphate, Ionic imbalance
- C. Glucose, Lactic acid
- D. Glucose, Ionic imbalance
Explanation
Muscle fatigue occurs when muscles are unable to generate force or contract due to a combination of factors. The two main factors are: 1. Deficiency of Adenosine Triphosphate (ATP): ATP is the primary energy source for muscle contractions. When ATP levels are depleted, muscles cannot contract effectively, leading to fatigue. 2. Excess accumulation of Lactic Acid: During intense muscle activity, anaerobic metabolism occurs, leading to the accumulation of lactic acid. High levels of lactic acid disrupt muscle function, leading to fatigue, soreness, and stiffness.
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About Muscle Contraction
Muscle contraction is explained by the sliding filament model, in which myosin heads pull actin filaments within sarcomeres using ATP. The topic covers calcium, troponin, tropomyosin, the neuromuscular junction and relaxation, with attention to how filament length stays almost constant while the sarcomere shortens.
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More Muscle Contraction questions
According to the sliding filament hypothesis, the release of_ from the sarcoplasmic reticulum causes the reorientation of certain components in the thin filament, permitting them to bind with extension from the thick myosin filaments:
The sarcomere is the region of a myofibril between two successive:
During muscle relaxation, the calcium ions are:
Upon arrival of nerve impulse, which of the following allows calcium ions to enter the cytosol?
When the muscle is at rest, _____ is disposed in such a way that it covers the sites on the _____ chain where the head of _____ becomes attached.
Contraction can be sustained for a long period of time by: