9. Muscle Tissue

Which of the following marks the boundaries of a sarcomere?

During the sliding filament theory, when does the myosin head cock back to store energy for the next cycle?

What is found in the A-bands of sarcomeres?

Which of the following events will not occur within the sarcomeres of a contracting muscle fiber?

Which specific region of the sarcomere contains only thin filaments?

Which statement correctly describes changes in a skeletal muscle cell during muscle contraction?

In the context of sliding filament theory, the contractile unit of skeletal muscle is the:

In the context of sliding filament theory, what is the functional unit of muscle contraction?

In the sliding filament theory, what happens to the thick and thin filaments during muscle contraction?

In the context of the sliding filament theory, which structure releases calcium into the sarcoplasm to initiate muscle contraction?

Which region of a sarcomere contains thin filaments?

Which of the following best describes the sarcomere in the context of the sliding filament theory?

During a muscle contraction, what happens to the actin and myosin filaments according to the sliding filament theory?

According to the sliding filament theory, which event occurs during muscle contraction?

In the sliding filament theory of skeletal muscle contraction, which structure actually shortens as the muscle contracts?