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Questions and Answers
What primarily makes up the volume of the sarcoplasm in muscle cells?
What primarily makes up the volume of the sarcoplasm in muscle cells?
- Myofibrils (correct)
- Ribosomes and mitochondria
- Thick and thin filaments
- Nuclei and Golgi apparatuses
Which type of muscle contains myofibrils as part of its contractile machinery?
Which type of muscle contains myofibrils as part of its contractile machinery?
- All types of muscle
- Smooth muscle only
- Skeletal muscle and cardiac muscle (correct)
- Cardiac muscle only
How are myofibrils structured within muscle cells?
How are myofibrils structured within muscle cells?
- Arranged in a circular formation
- Randomly arranged throughout the cell
- Bundled in parallel and running the entire length of the cell (correct)
- Bundled in parallel and oriented vertically
Which of the following statements about thick and thin filaments is true?
Which of the following statements about thick and thin filaments is true?
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What is the diameter of myofibrils in muscle cells?
What is the diameter of myofibrils in muscle cells?
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Study Notes
Sarcoplasm
- Sarcoplasm is the cytoplasm of muscle cells
- Sarcoplasm contains similar organelles as other cells such as nuclei, Golgi apparatus, ribosomes, and mitochondria
- 80% of the sarcoplasm is filled with myofibrils
Myofibrils
- Myofibrils are long, thin, rod-like structures found in muscle cells
- Myofibrils run the entire length of the muscle cell
- Myofibrils are responsible for the contractile machinery of skeletal and cardiac muscle
- Myofibrils consist of thick filaments and thin filaments
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Description
Test your knowledge on the structure and function of sarcoplasm and myofibrils in muscle cells. This quiz covers essential organelles found in sarcoplasm and the role of myofibrils in muscle contraction. Perfect for students learning about muscle physiology.
