The biceps brachii, triceps brachii, and quadriceps are muscles named according to their:
Location
Number of origins
Shape
Fascicle arrangement
The Correct Answer is B
Choice A reason: While muscle names can reflect location (e.g., brachialis for the arm), the names "biceps," "triceps," and "quadriceps" specifically refer to the number of origins, not their anatomical position.
Choice B reason: "Biceps" means two heads, "triceps" means three heads, and "quadriceps" means four heads. These names are derived from the number of tendinous origins each muscle has, making this the correct classification.
Choice C reason: Muscle shape does influence naming in some cases (e.g., deltoid for triangular), but it is not the basis for naming biceps, triceps, or quadriceps.
Choice D reason: Fascicle arrangement refers to the pattern of muscle fibers (e.g., parallel, pennate), which affects function and strength but is not the naming basis for these specific muscles.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A reason: Sharpey’s fibers are collagen fibers that anchor the periosteum to the underlying bone. They are structural, not part of bone marrow.
Choice B reason: Elastic tissue is found in ligaments and certain connective tissues but is not a major component of yellow bone marrow.
Choice C reason: Spongy bone surrounds the marrow cavities but is not the content of yellow marrow itself.
Choice D reason: Fat is the correct answer. Yellow bone marrow primarily consists of adipocytes and serves as an energy reserve. It replaces red marrow in many bones as a person ages.
Choice E reason: Blood-forming cells are found in red bone marrow, not yellow marrow. Red marrow is responsible for hematopoiesis.
Correct Answer is D
Explanation
Choice A reason: The medullary cavity is found in the diaphysis of long bones and contains bone marrow. It is not a feature of spongy bone.
Choice B reason: Lamellar bone refers to mature bone with organized collagen fibers. While spongy bone can be lamellar, this does not define its structural organization.
Choice C reason: Osteons, or Haversian systems, are cylindrical structures found in compact bone, not spongy bone.
Choice D reason: Trabeculae are the defining structural units of spongy bone. They are lattice-like networks of bone tissue that provide strength while minimizing weight and house bone marrow between their spaces.
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