Which Pairing of a Sarcomere Structure with Its Corresponding Description

question 124

Multiple Choice

Which pairing of a sarcomere structure with its corresponding description is correct?

• A) H zone: appears light on an electron micrograph; found where actin and myosin filaments overlap when muscle is relaxed
• B) Z line: where myosin is anchored in the center of the H zone
• C) M band: dark stripe within the H zone whose proteins hold actin in a regular arrangement
• D) A band: region containing only myosin filaments when the muscle is contracted
• E) I band: appears light on an electron micrograph; found where actin and myosin filaments do not overlap

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