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Skeletal Muscle Calcium Ion Flux

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Questions and Answers

What is the main function of skeletal muscle in relation to the skeleton?

To move bones of the skeleton at joints (correct)

To regulate body temperature

To produce blood cells

To provide structural support to the skeleton

What is the functional unit of the skeletal muscle?

Sarcomere (correct)

Myoneural junction

Myofibril

Muscle fiber

What is the role of troponin in muscle contraction?

To bind to actin and prevent contraction

To break down ATP and release energy

To bind to myosin and cause contraction

To bind to calcium and expose actin binding site for myosin (correct)

What is the outcome of thin filaments sliding along thick filaments during muscle contraction?

The I bands disappear and the A bands remain constant Signup and view all the answers

What is the role of myosin in muscle contraction?

To have ATPase activity and move along the thin filaments Signup and view all the answers

What is the site of binding for myosin on the thin filaments?

Actin Signup and view all the answers

What is the role of calcium in muscle contraction?

To bind to troponin-C and expose actin binding site for myosin Signup and view all the answers

What is the structural protein of the thin filaments?

Actin Signup and view all the answers

What is the result of the troponin-tropomyosin complex moving during muscle contraction?

The actin binding site for myosin is exposed Signup and view all the answers

What is the composition of troponin?

Three subunits: troponin-T, troponin-I, and troponin-C Signup and view all the answers