National Certification Board for Therapeutic Massage & Bodywork (NCBTMB) Practice Exam

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Prepare for the NCBTMB Test. Use flashcards and multiple-choice questions, each with hints and explanations, to get ready for your exam!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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Which bone is identified as the largest bone in the arm?

  1. Scapula

  2. Radius

  3. Humerus

  4. Ulna

The correct answer is: Humerus

The humerus is identified as the largest bone in the arm because it serves as the primary bone of the upper arm, extending from the shoulder to the elbow. Its structure allows for significant strength and support, enabling a wide range of movements at the shoulder joint and the elbow joint. In contrast, the scapula, which is located on the posterior side of the rib cage, is not classified as a bone in the arm itself; rather, it is part of the shoulder girdle and facilitates the articulation of the humerus. The radius and ulna are both classified as forearm bones, with the radius being on the thumb side and the ulna on the pinky side. While these bones are important for forearm function and movement, they are shorter than the humerus and do not possess the same structural mass. Thus, the humerus stands out not only in size but also in its pivotal role in upper limb mobility.