9. Muscle Tissue

Which of the following statements about H zones and I bands is true?

What happens to the I band when the sarcomere contracts during muscle contraction?

What is primarily found in the I-bands of sarcomeres?

Which area of a sarcomere only contains thick filaments?

What is the sliding filament model of muscle contraction?

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

Which of the following regions of the sarcomere contains overlapping thick and thin filaments?

Which of the following statements regarding the sliding filament model is false?

What is the functional unit of muscle contraction?

The binding of calcium to which molecule causes the myosin binding sites on actin to be exposed?

In the context of sliding filament theory, what structural feature causes skeletal muscle fibers to appear striated under the microscope?

In the context of the sliding filament theory, what is the H band of the sarcomere?

What is a power stroke during muscle contraction?

What is released when myosin heads attach to actin filaments during muscle contraction according to the sliding filament theory?

What causes the myosin head to release its attachment to actin during muscle contraction?