lab practical 2 NTK List 9

The component of the sarcomere that appears darker because it contains thick filaments and areas in which the thick and thin filaments overlap.

A bead-shaped contractile protein found in muscle fibers and motile cells

A myofilament that consists of the structural protein titin.

meaning within the muscle, is a wispy layer of areolar connective tissue that ensheaths each individual myocyte

a sheath of fibrous elastic tissue surrounding a muscle.

The component of the sarcomere that appears lighter because it contains only thin filaments.

the zone of the thick filaments that is not superimposed by the thin filaments.

the attachment site for the thick filaments

The specialized region of the skeletal muscle fiber plasma membrane that contains receptors for acetylcholine.

An alternate name for a skeletal muscle cell.

Long, cylindrical organelles composed of muscle proteins in a muscle fiber.

A club-shaped contractile protein found in muscle fibers and motile cells

The location where a neuron communicates with a muscle fiber.

The plasma membrane of a muscle fiber.

The functional unit of muscle contraction; consists of the area of the myofibril from one Z-disc to the next Z-disc.

The specialized smooth endoplasmic reticulum of a muscle fiber that stores calcium ions.

Enlarged regions of the sarcoplasmic reticulum where it contacts T-tubules.

A myofilament composed of many molecules of the protein myosin.

A myofilament composed of molecules of the proteins actin, troponin, and tropomyosin.

the structure formed by a T tubule with a sarcoplasmic reticulum (SR) known as the terminal cisterna on either side.

a protein involved in muscle contraction. It is related to myosin and occurs together with troponin in the thin filaments of muscle tissue.

a complex of muscle proteins which, when combined with Ca++, influence tropomyosin to initiate contraction.