Muscle Physiology: Skeletal Muscle Structure

What is the name of the plasma membrane of a muscle cell?

Which element of a muscle cell contains the contractile components?

What is the name of the dark region in the center of the A band of a sarcomere?

Which structure anchors the thin filaments at the borders of a sarcomere?

What provides the attachment between actin (thin) and myosin (thick) filaments in a muscle cell?

Which protein uncovers binding sites on actin subunits when bound to calcium?

What is the role of titin in muscle contraction?

What occurs during the power stroke in the cross bridge cycle?

What is the role of excitation-contraction coupling in muscle contraction?

What is the main function of tropomyosin in muscle contraction?

What is the name of the smooth endoplasmic reticulum surrounding the myofibrils in a muscle cell?

What is the main function of the Z lines in a sarcomere?

Which region of the sarcomere appears dark and contains the thick filaments?

What is the role of titin in muscle cells?

What provides the attachment between actin (thin) and myosin (thick) filaments in a muscle cell?

What occurs during the power stroke in the cross bridge cycle?

What is the role of the myosin molecule in muscle contraction?

Which sequence of events accurately describes the cross bridge cycle in muscle contraction?

What is the function of the regulatory protein tropomyosin in muscle contraction?

What is the primary role of troponin in muscle contraction?

What is the function of the elastic protein titin in muscle contraction?

During which phase of the cross bridge cycle does the myosin head detach from actin?

What occurs when troponin binds to calcium during muscle contraction?

What is the significance of the sliding-filament model in explaining muscle contraction?

What is involved in excitation-contraction coupling in muscle cells?

What is the primary function of neuromuscular junction in muscle contraction?