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Anatomy question that I cannot find in my book...?

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When stress is applied to bone:

A) The bone compensates by becoming thinner in the region of stress.

B) Trabeculae are formed perpendicular to the zone of stress to increase strength

C) The minerals in the bone produce weak electrical fields that attracts osteoblasts.

D) Osteoclast activity increases

E) The bone becomes thin and brittle.

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3 ANSWERS


  1. I think it is letter B  , because when a bone is under stress it will try to increase its strengh and who is resposable by that is the trabeculaes

    But I would considere the letter C as well


  2. According to this site the answer is D.

    Bone Remodeling

    Increased metabolic activity of the bone is a manifestation of remodeling, or adaptation to mechanical properties, in response to changes in loading patterns.2,6,12 Microscopically, remodeling occurs in a well-defined sequence. When a bone encounters a new, sustained mechanical stress, osteoclasts begin to remove the old bone matrix, thus creating tunnels in the framework of the bone. Subsequently, osteoblasts fill the tunnels with new bone matrix. Ideally, the sequence progresses rapidly enough that the bone continues to support ongoing loads of the same nature, despite the increased porosity of the bone. In pathologic situations, the porous bone inadequately accommodates continued loading, resulting in microfissures that may progress to stress fracture.10,13

  3. I would choose D, Osteoclasts "reabsorb" bone...so it would be trying to do it's job to help support or sustain the stress....just a guess though.

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