Which of the following bone tissues is adapted to support weight and withstand twisting stresses?
Irregular bone
Trabecular bone
Interstitial bone
Compact bone
Spongy bone
The Correct Answer is D
Choice A reason: Irregular bones have complex shapes and serve various functions, such as protection and muscle attachment, but they are not specialized for weight-bearing or resistance to twisting.
Choice B reason: Trabecular bone, also known as spongy bone, is lightweight and porous. It helps absorb shock and supports bone marrow but is not optimized for resisting twisting stresses.
Choice C reason: Interstitial bone refers to remnants of old osteons found between newer ones in compact bone. It is not a distinct tissue type adapted for mechanical stress.
Choice D reason: Compact bone is the correct answer. It is dense and organized into osteons, which provide strength and resistance to compressive and torsional forces. It forms the outer layer of bones and is especially prominent in the diaphysis of long bones.
Choice E reason: Spongy bone is adapted for shock absorption and lightness but lacks the dense structure needed to resist twisting and heavy loads.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A reason: The talus is a tarsal bone in the ankle that articulates with the tibia and fibula. It is not embedded within a tendon and therefore not classified as a sesamoid bone.
Choice B reason: The radius is one of the two long bones in the forearm. It is not a sesamoid bone, as it is not formed within a tendon.
Choice C reason: The femur is the longest and strongest bone in the body, located in the thigh. It is a long bone, not a sesamoid bone.
Choice D reason: The hamate is a carpal bone in the wrist. It is not embedded in a tendon and thus not a sesamoid bone.
Choice E reason: The patella, or kneecap, is the most well-known example of a sesamoid bone. It is embedded within the quadriceps tendon and functions to protect the knee joint and improve leverage during leg extension.
Correct Answer is C
Explanation
Choice A reason: Preventing muscle fatigue is not the primary function of wave summation. Fatigue is influenced by metabolic factors and sustained activity, not by the summation of muscle twitches.
Choice B reason: While wave summation does increase muscle tension, this is a secondary effect. The main purpose is to produce a more sustained and coordinated contraction.
Choice C reason: Wave summation occurs when successive stimuli are delivered before the muscle has completely relaxed, leading to a stronger and smoother contraction. This mechanism allows for continuous muscle activity, making it the correct answer.
Choice D reason: Wave summation enhances, not lessens, muscle contraction. It builds upon previous contractions to produce a more forceful and sustained response. Therefore, this choice is incorrect.
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