Myoglobin is found in:
Correct answer: C. Muscles
- A. Bone
- B. Connective tissue
- C. Muscles
- D. Cartilage
Explanation
Myoglobin is a protein found in muscle fibers, responsible for storing oxygen and facilitating its availability during muscle contraction. This is crucial to meet the high oxygen demands for energy production within muscle cells. Unlike bones, connective tissue, and cartilage, muscles require direct oxygen availability for sustained activity, which is why myoglobin is present there. Bones, connective tissue, and cartilage serve structural and supportive roles and do not have the same oxygen storage needs.
This question appeared on the ETEA MDCAT 2013 paper, which you can sit online with every answer explained.
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About Muscles
Muscles covers skeletal, smooth and cardiac muscle, their microscopic structure and the roles of tendons, myofibrils, actin and myosin. It explains the sliding filament mechanism, sarcomere shortening, neuromuscular transmission and calcium regulation, while distinguishing voluntary skeletal movement from involuntary contraction in smooth and cardiac muscle.
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