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Questions and Answers
What is the function of Troponin I in muscle contraction?
What is the function of Troponin I in muscle contraction?
- Binds other troponin molecules to tropomyosin
- Inhibits the interaction of actin with myosin (correct)
- Assists in rapid transmission of action potential
- Forms the backbone of F-actin
What is the main function of the sarcotubular system?
What is the main function of the sarcotubular system?
- Facilitates rapid transmission of action potential (correct)
- Stores calcium ions
- Secrete neurotransmitters
- Initiates action potential
What is the composition of the actin filament?
What is the composition of the actin filament?
- Actin, troponin, and tropomyosin (correct)
- Actin, myosin, and tropomyosin
- Actin, troponin, and myosin
- Actin and myosin only
What is the arrangement of myofibrils in skeletal muscles called?
What is the arrangement of myofibrils in skeletal muscles called?
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What is the structure responsible for ATP production needed for muscle contraction?
What is the structure responsible for ATP production needed for muscle contraction?
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What type of muscles contain pacemaker cells and contract rhythmically involuntarily in the heart?
What type of muscles contain pacemaker cells and contract rhythmically involuntarily in the heart?
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What is the function of the sarcolemma in a muscle fiber?
What is the function of the sarcolemma in a muscle fiber?
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Which type of muscle lacks cross-striations?
Which type of muscle lacks cross-striations?
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What are the building blocks of the muscular system?
What are the building blocks of the muscular system?
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How many actin filaments are present in each myofibril?
How many actin filaments are present in each myofibril?
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