Welcome to the Quiz!
This quiz contains 9 questions from a mix of 1 subtopics.
Which of the following is NOT a key component inside a muscle fibre?
sarcolemma
sarcoplasm
axon
myofibril
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What slides past each other during muscle contraction?
actin and myosin filaments
sarcolemma and sarcoplasm
Z-lines
nuclei
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Where are myosin filaments absent in a sarcomere?
A band
H-zone
I band
M-line
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What does the A band of a sarcomere contain?
only myosin filaments
only actin filaments
neither actin nor myosin filaments
both actin and myosin filaments
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What is the cytoplasm of muscle fibres called?
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Which of the following is responsible for storing and releasing calcium ions in a muscle fibre?
sarcolemma
myofibrils
sarcoplasm
sarcoplasmic reticulum
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What structure marks the boundaries of sarcomeres?
Z-lines
M-line
A bands
H-zone
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What section of a sarcomere contains only myosin filaments?
A bands
Z-lines
I bands
H-zone
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Which main filament in sarcomeres is composed of long rod shapes with bulbous heads?
T tubules
actin filaments
Z-lines
myosin filaments
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