Podcast
Play an AI-generated podcast conversation about this lesson
Download our mobile app to listen on the go
Get App
Questions and Answers
What is the primary function of myofibrils within skeletal muscle cells?
What is the primary function of myofibrils within skeletal muscle cells?
- To provide structural support to the cell
- To serve as the contractile machinery of the muscle (correct)
- To transport oxygen throughout the muscle tissue
- To store energy in the form of glycogen
Which components primarily compose myofibrils?
Which components primarily compose myofibrils?
- Thick filaments and thin filaments (correct)
- Nuclei and mitochondria
- Ribosomes and golgi apparatuses
- Smooth and cardiac muscle fibers
What percentage of the sarcoplasm volume is occupied by myofibrils?
What percentage of the sarcoplasm volume is occupied by myofibrils?
- 80% (correct)
- 90%
- 50%
- 30%
Which type of muscle tissue does NOT utilize myofibrils for contraction?
Which type of muscle tissue does NOT utilize myofibrils for contraction?
Signup and view all the answers
What is the approximate diameter of myofibrils?
What is the approximate diameter of myofibrils?
Signup and view all the answers
Flashcards are hidden until you start studying
Study Notes
Myofibrils
- Myofibrils are rod-like structures found in the sarcoplasm of skeletal and cardiac muscle cells.
- They are bundled in parallel and run the entire length of the cell.
- They represent the contractile machinery of skeletal and cardiac muscle.
- They are primarily composed of thick filaments and thin filaments.
Sarcoplasm
- The sarcoplasm is the cytoplasm of muscle cells.
- It contains many organelles found in other cells, including nuclei, Golgi apparatuses, ribosomes, and mitochondria.
- Approximately 80% of the sarcoplasm is devoted to myofibrils.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
