According to the Sliding Filament Theory of Muscle Contraction

question 9

Multiple Choice

According to the sliding filament theory of muscle contraction,

• A)actin binds ATP and breaks it apart as actin pulls against myosin.
• B)calcium ions are released from myosin as the filaments slide by.
• C)the thick and thin filaments do not change length during this process.
• D)an accordion-like pleat is formed as the myosin and actin interact.
• E)All of the choices are correct.

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Definitions:

Quadriceps Group

A muscle group located in the front of the thigh, responsible for extending the knee and composed of four muscles.

Vastus Lateralis

A large muscle on the side of the thigh, part of the quadriceps group, crucial for extending the knee.

Rectus Femoris

A muscle in the quadriceps that extends the knee and flexes the thigh at the hip.

Sartorius

The longest muscle in the human body, running from the hip to the knee and assisting in flexing, abducting, and laterally rotating the thigh.