Bundles of myofibrils are enclosed by the:
Correct answer: D. Muscle cell membrane or sarcolemma
- A. Neurolemma
- B. Nuclear membrane
- C. Sarcoplasmic reticulum
- D. Muscle cell membrane or sarcolemma
Explanation
Option D is correct.The muscle cell membrane is also known as the sarcolemma. It is the plasma membrane that surrounds a muscle fiber. It is a thin, flexible membrane that is made up of a lipid bilayer and a layer of proteins. The sarcolemma plays an important role in the contraction and relaxation of muscle fiber. The sarcolemma is made up of a lipid bilayer, which is a double layer of phospholipids. The phospholipids in the sarcolemma are arranged in a way that allows nutrients and oxygen to enter the muscle fiber and waste products to exit the muscle fiber.
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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
Myofibrils run in parallel fashion and extend the entire length of the:
The sarcoplasm of muscle fibers differs from the cytoplasm of the other cells as it contains usually:
It is a long cylindrical cell with multiple oval nuclei arranged just beneath its sarcolemma:
The light band of sarcomere is called:
Light and dark bands of muscles give the muscle cell as a whole its:
Myofibrils contain: