Which of the following is NOT a movement that can occur between vertebrae?
supination
extension
flexion
rotation
The Correct Answer is A
Choice A reason: Supination refers to the rotation of the forearm or foot, not the vertebral column. It is not a movement that occurs between vertebrae, making it the correct answer.
Choice B reason: Extension is a movement that increases the angle between vertebrae, such as bending backward. It is a common vertebral movement.
Choice C reason: Flexion decreases the angle between vertebrae, such as bending forward. It is a typical movement of the spine.
Choice D reason: Rotation involves turning the vertebral column around its axis, such as twisting the torso. It is a valid vertebral movement.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A reason: Myofilaments are the smallest contractile units within myofibrils, composed of actin and myosin. They do not represent bundles 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.
Choice C reason: Myofibrils are microscopic structures within individual muscle cells that contain the contractile machinery. They 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.
Correct Answer is A
Explanation
Choice A reason: The central canal, also known as the Haversian canal, is located at the center of each osteon in compact bone. It contains blood vessels and nerve fibers that supply nutrients and signals to the bone cells.
Choice B reason: Adipose tissue is found in yellow marrow, primarily in the medullary cavity of long bones, not in the central canal of osteons.
Choice C reason: Yellow marrow and spicules are found in the medullary cavity and spongy bone, respectively. They are not components of the central canal.
Choice D reason: Cartilage is not present in the central canal. Interstitial lamellae are layers of bone matrix found between osteons, not within the canal.
Choice E reason: Red marrow is found in spongy bone and certain flat bones, not in the central canal. While nerves are present, the absence of blood vessels in this choice makes it incomplete.
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