When a bone is repeatedly loaded with low-level forces over an extended period of time,fatigue fractures may occur within the bone.This is due to:
A) Increased stiffness,decreased yield strength,increased permanent deformation
B) Decreased stiffness,increased yield strength,no effect on deformation
C) Decreased stiffness,decreased yield strength,increased permanent deformation
D) Increased stiffness,increased yield strength,no effect on deformation

Question

Quizplus · Accepted Answer

When a bone is repeatedly loaded with low-level forces over an extended period of time, fatigue fractures may occur within the bone due to decreased stiffness, decreased yield strength, and increased permanent deformation. This happens because the bone is unable to withstand the repeated loading and starts to deform permanently, leading to fatigue fractures. Option A is incorrect because increased stiffness is not a cause of fatigue fractures, rather it may prevent them. Option B is also incorrect because increased yield strength does not cause fatigue fractures. Option D is incorrect because increased stiffness and increased yield strength do not have any effect on deformation.

When a Bone Is Repeatedly Loaded with Low-Level Forces Over