9. Muscle Tissue

What is the functional contractile unit of the myofibril?

What is the primary function of T-tubules in muscle cells?

What structure is the functional unit of contraction in a skeletal muscle fiber?

What protein are the thick filaments in skeletal muscle primarily composed of?

Which of the following correctly describes the hierarchical organization of a skeletal muscle from largest to smallest structure?

What is a motor unit composed of?

What proteins primarily make up the thin filaments in a sarcomere?

Which part of the sarcolemma contains acetylcholine receptors?

What protein primarily makes up the thick filaments in skeletal muscle fibers?

Which statement best describes the relationship between the Z line and titin within a sarcomere?

Which of the following describes a transverse tubule (T-tubule)?

Which protein is found in thin filaments but is not a regulatory protein?

What term is used for the plasma membrane of a muscle fiber?

The contractile portion of the thin filament is composed of what protein?

What is the primary function of T-tubules in muscle cells?