Muscular Vertebrate

The myosin component was believed to appear in

• sponges

• flatworm

• nematodes

• seastars

Most muscles were developed from what germ layer?

• mesoderm

• ectoderm

• all of the choices

• endoderm

The formation of the muscular systems begins in which time of embryonic development?

• fourth month

• second month

• first month

• third month

A connective tissue that wraps the entire muscle

• endomysium

• epimysium

• perimysium

• ectomysium

Actin filament is attached to the

• Z-line

• M-line

• A band

• I band

Axial and limb muscles were derived from

• intermediate mesoderm

• paraxial mesoderm

• splanchnic mesoderm

• somatic mesoderm

Epicardium and mesentries were developed from

• paraxial mesdoerm

• splanchnic mesoderm

• intermediate mesoderm

• somatic mesoderm

The jaw and pharyngeal musculatures arise from two embryonic sources

• mesenchyme and somites

• paraxial mesoderm and paired hypomeres

• hypobranchial musculature and branchiomeric musculature

• somitomeres and apaxial musculature

The skeletal mostly derived from

• mesenchyme

• mesomere

• hypomere

• paraxial mesoderm

In fishes, musculature consist of segmental

• actin

• myomeres

• myosin

• sarcomere