Muscle anatomy

Front

What is a myofilament?

Back

A myofilament is a structure composed of proteins, specifically actin and myosin, that are responsible for muscle contraction.

Front

What is a tendon?

Back

A tendon is a cord-like extension of connective tissue that attaches muscle to bone.

Front

What is the role of epimysium?

Back

Epimysium is a layer of connective tissue that surrounds the entire muscle, providing support and protection.

Front

What is a sarcomere?

Back

A sarcomere is the basic functional unit of a muscle fiber, defined by the area between two Z lines, containing actin and myosin filaments.

Front

What is the A band in muscle anatomy?

Back

The A band is the dark region of a sarcomere that contains the entire length of the myosin filaments.

Front

What is the function of myofibrils?

Back

Myofibrils are long, thread-like structures within muscle fibers that contain the contractile elements (sarcomeres) responsible for muscle contraction.

Front

What is the difference between actin and myosin?

Back

Actin is a thin filament that interacts with myosin, a thick filament, to facilitate muscle contraction.

Front

What is perimysium?

Back

Perimysium is a connective tissue sheath that surrounds bundles of muscle fibers (fascicles) within a muscle.

Front

What is the sarcolemma?

Back

The sarcolemma is the cell membrane of a muscle fiber, which plays a role in conducting electrical impulses.

Front

What is the function of the Z line?

Back

The Z line defines the boundaries of a sarcomere and anchors the actin filaments.