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Questions and Answers
Which bands on the myofibrils are called A bands?
Which bands on the myofibrils are called A bands?
- The dark bands (correct)
- The bands with the M-line in the center
- The light bands
- The bands divided by Z-lines
Which bands on the myofibrils are called I bands?
Which bands on the myofibrils are called I bands?
- The bands divided by Z-lines
- The dark bands
- The light bands (correct)
- The bands with the M-line in the center
What is the area between two adjacent Z-lines called?
What is the area between two adjacent Z-lines called?
- Sarcomere (correct)
- A band
- I band
- H band
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Study Notes
Myofibril Structure
- A bands are the dark bands on the myofibrils, containing thick filaments of myosin.
- I bands are the light bands on the myofibrils, containing thin filaments of actin.
- The area between two adjacent Z-lines is called a sarcomere, which is the functional unit of muscle contraction.
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