The 'red' color of certain muscle fibers is primarily attributed to high concentrations of which protein?
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Correct answer: Myoglobin
Myoglobin is an iron- and oxygen-binding protein found in the sarcoplasm of muscle fibers. It is most abundant in Type I and Type IIa fibers, providing a reservoir of oxygen for aerobic respiration.
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More Muscle Fibers questions
- Which organelles are significantly more numerous in Type I muscle fibers compared to Type IIb fibers?
- Type IIa muscle fibers are often referred to as 'intermediate' because they:
- In the human body, where would you most likely find a high proportion of Type I muscle fibers?
- Which of the following is a characteristic of Type IIb (Fast Glycolytic) fibers regarding glycogen content?
- Which fiber type would have the highest density of surrounding blood capillaries?
- Skeletal muscle fibers are formed during development by the fusion of: