Terms Related to Muscle Fibers

• Involuntary Muscle

  Unstriated and unstriped muscle, one of the muscles of the internal organs, blood vessels, hair follicles, etc. Contractile elements are elongated, usually spindle-shaped cells with ...

• Type II Muscle Fibers

  Skeletal muscle fibers having high myofibrillar ATPase activity, high glycolytic enzyme activities, and an intermediate glycogen content which produce a fast twitch. There are two ...

• Smooth Muscles

  Unstriated and unstriped muscle, one of the muscles of the internal organs, blood vessels, hair follicles, etc. Contractile elements are elongated, usually spindle-shaped cells with ...

• Leiomyosarcoma

  A sarcoma containing large spindle cells of smooth muscle. Although it rarely occurs in soft tissue, it is common in the viscera. It is the ...

• Actomyosin

  A protein complex of actin and MYOSINS occurring in muscle. It is the essential contractile substance of muscle.

• Muscle Spindle

  Mechanoreceptors found between skeletal muscle fibers. Muscle spindles are arranged in parallel with muscle fibers and respond to the passive stretch of the muscle, but ...

• Neurilemma

  The outermost part of the ectodermal sheath of myelinated nerve fibers, including the sheath cell nucleus and its cytoplasm but not the concentric myelin-containing lamellae. ...