The process of bones increasing in thickness is known as:
Appositional growth
Concentric growth
Interstitial growth
Circumferential growth
Epiphyseal plate closure
The Correct Answer is A
Choice A reason: Appositional growth is the correct answer. It refers to the process by which bones increase in diameter or thickness. This occurs when osteoblasts in the periosteum lay down new bone matrix on the outer surface, while osteoclasts resorb bone on the inner surface to maintain proper proportions.
Choice B reason: Concentric growth is not a recognized term in bone physiology. It may refer to circular layering in osteons but not to bone thickening.
Choice C reason: Interstitial growth occurs within cartilage and is responsible for lengthening during development. It does not contribute to bone thickness.
Choice D reason: Circumferential growth is a vague term and not commonly used in bone biology. It may imply growth around the circumference but is not the standard term for bone thickening.
Choice E reason: Epiphyseal plate closure marks the end of longitudinal bone growth during adolescence. It does not relate to increasing bone thickness.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A reason: Myosin is the thick filament in muscle fibers and is not directly attached to the Z disc. It anchors in the center of the sarcomere at the M line and interacts with actin during contraction.
Choice B reason: Actin is the correct answer. It forms the thin filaments in muscle fibers and is directly anchored to the Z disc. This attachment allows actin to slide past myosin during muscle contraction, shortening the sarcomere.
Choice C reason: Troponin is a regulatory protein complex that binds calcium and controls the position of tropomyosin on actin filaments. It is located along the actin filament but is not attached to the Z disc.
Choice D reason: Myofibrils are bundles of actin and myosin filaments organized into sarcomeres. While they span the length of the muscle fiber and include Z discs, they are not themselves attached to the Z disc.
Choice E reason: Tropomyosin is a regulatory protein that lies along the actin filament and blocks myosin-binding sites in a relaxed muscle. It is not anchored to the Z disc.
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.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.