The axial skeleton includes:
The skull, the scapula, and the vertebral column
The skull, vertebral column, and pelvis
Pectoral girdle, pelvic girdle, and vertebral column
Arms, legs, hands, and feet
The skull, vertebral column, and rib cage
The Correct Answer is E
Choice A reason: The scapula is part of the appendicular skeleton, not the axial skeleton. Therefore, this combination is incorrect.
Choice B reason: The pelvis includes both axial and appendicular components, but the pelvic girdle is considered part of the appendicular skeleton. This makes the answer inaccurate.
Choice C reason: Both the pectoral and pelvic girdles are part of the appendicular skeleton. Including them in the axial skeleton is incorrect.
Choice D reason: Arms, legs, hands, and feet are all part of the appendicular skeleton. They are not included in the axial skeleton.
Choice E reason: This is the correct answer. The axial skeleton consists of the skull, vertebral column, and rib cage. These structures form the central axis of the body and protect vital organs such as the brain, spinal cord, and thoracic organs.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A reason: Flat bones are typically thin and broad, such as the sternum or skull bones. They do not match the described dimensions of Emily’s bone.
Choice B reason: Irregular bones have complex shapes that do not fit into other categories, such as vertebrae. The bone described is not irregular.
Choice C reason: Short bones are roughly cube-shaped and found in areas like the wrist and ankle. A bone that is 3 inches long does not fit this category.
Choice D reason: Long bones are characterized by being longer than they are wide, typically found in the limbs. A bone that is 3 inches long and 1 inch wide fits this classification.
Choice E reason: Sesamoid bones are small, round bones embedded in tendons, like the patella. The described bone does not fit this category
Correct Answer is B
Explanation
Choice A reason: Myofilaments are microscopic protein filaments composed of actin and myosin. They are the smallest contractile units within myofibrils and do not represent a bundle of muscle fibers.
Choice B reason: Fascicle is the correct term for a bundle of muscle fibers. Each fascicle is surrounded by perimysium and contains multiple muscle cells (myocytes), allowing coordinated contraction and force generation.
Choice C reason: Myofibrils are intracellular structures found within individual muscle cells. They contain repeating units of sarcomeres and are not bundles of muscle fibers.
Choice D reason: Whole muscle refers to the entire organ composed of multiple fascicles, connective tissues, blood vessels, and nerves. It is a larger structure than a bundle of muscle fibers.
Choice E reason: A muscle cell, or myocyte, is a single unit within a fascicle. It is not a bundle but an individual contractile cell.
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