Which of the following is a bone marking name that indicates a rounded articular projection of bone?

Choice A reason: Protraction and retraction refer to the forward and backward movement of the mandible, which occurs during certain chewing motions but is not the primary movement involved in chewing.

Choice B reason: Opposition and reposition are movements of the thumb and fingers, not the mandible. They are unrelated to chewing.

Choice C reason: Pronation is a rotational movement of the forearm, not the mandible. Elevation is correct, but pronation does not apply to jaw movement.

Choice D reason: Elevation and depression are the correct movements involved in chewing. Elevation closes the jaw (biting), and depression opens it (jaw lowering).

Choice E reason: Supination is also a forearm movement and does not apply to the mandible. Depression is correct, but supination is irrelevant here.

Choice A reason: Myofilaments are microscopic protein filaments (actin and myosin) within myofibrils. They are not bundles of muscle fibers but rather the smallest contractile units.

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, making it the appropriate anatomical structure.

Choice C reason: Myofibrils are intracellular structures within muscle cells that contain myofilaments. They are not bundles of muscle fibers but rather components of individual muscle cells.

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: Muscle cell, also known as a muscle fiber, is a single cell within a fascicle. It is not a bundle but an individual unit.