The sarcoplasm of muscle fibers differs from the cytoplasm of the other cells as it contains usually:
Correct answer: B. A unique oxygen binding protein, myoglobin
- A. Large amount of stored starch
- B. A unique oxygen binding protein, myoglobin
- C. Hemoglobin that stores oxygen
- D. Large amount of stored lipids
Explanation
Option B is correct.Myoglobin is an oxygen-binding protein that is found in the sarcoplasm of muscle fibers. It is a red-colored protein that gives muscle its characteristic color. Myoglobin binds oxygen molecules and stores them in the sarcoplasm. When a muscle fiber contracts, the myoglobin releases oxygen to the mitochondria, where it is used to produce ATP, the energy molecule that powers muscle contraction.
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About Support and Movement
Support and movement covers the axial and appendicular skeleton, bone structure, joints and the arrangement of skeletal muscles. Muscle contraction is explained through actin, myosin, sliding filaments, calcium ions and ATP, while arthritis is distinguished as a disorder of joints rather than a normal part of movement.
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More Support and Movement questions
It is a long cylindrical cell with multiple oval nuclei arranged just beneath its sarcolemma:
Generally, each end of the entire muscle is attached to bone by a bundle of collagen, non-elastic fibers known as:
The muscles that are attached to the skeleton are:
Myofibrils run in parallel fashion and extend the entire length of the:
Bundles of myofibrils are enclosed by the:
The light band of sarcomere is called: