National League for Nursing (NLN PAX) Practice Exam

The correct answer is that striated tissue with multinucleate cells is predominantly found in the arm muscle. This type of tissue is known as skeletal muscle, which is characterized by its striations (striped appearance) due to the arrangement of myofibrils and is voluntary in nature. Skeletal muscle fibers are long and multi-nucleated, allowing for a greater force of contraction, which is necessary for activities such as moving the limbs.

Other types of muscle tissue, such as cardiac muscle found in the heart, are also striated but differ significantly in their cellular structure and function. Cardiac muscle cells are typically branched and single or double-nucleated, making them distinct from skeletal muscle fibers. Smooth muscle, found in the stomach and other organs, is not striated and is also involuntary, which further distinguishes it from the striated muscles of the arms.

In summary, the presence of striations and multinucleation strongly identifies the skeletal muscle tissue found in the arm muscles, highlighting its unique structural characteristics that enable the voluntary movement required for complex motor activities.