Skeletal Muscle Development and Structure

Muscle cells are of ______ origin and differentiate by a gradual process of cell lengthening with abundant synthesis of the myofibrillar proteins actin and myosin.

The ______ of muscle cells contains the sarcoplasm, sarcoplasmic reticulum, and sarcolemma.

Skeletal muscle is also known as ______ muscle.

The development of skeletal muscle is a process that occurs during ______.

Muscle tissue can be classified into three main types: skeletal, cardiac, and ______ muscle.

The muscle fibers of skeletal muscle are ______ cells with diameters of 10-100 μm.

Mesenchymal ______ fuse, forming myotubes with many nuclei during embryonic muscle development.

The ______ is a delicate layer of reticular fibers tissue surrounding the external lamina of individual muscle fibers.

The ______ is a thin connective tissue layer that immediately surrounds each bundle of muscle fibers termed a fascicle.

Satellite cells proliferate and produce new ______ fibers following muscle injury.

I bands are bisected by a dark transverse line, the ______ disc.

Myotubes then further differentiate to form ______ muscle fibers.

ACh binds to ACh receptors in the motor end plate of the ______ junction.

Calcium ions bind to ______.

Myosin heads of ______ filaments attach to exposed active sites.

Muscles with mainly type I ______ are often postural muscles.

Mitochondria are abundant in ______ fibers.

The process of moving tropomyosin to expose active sites is done by ______.