Chapter 6 MCQ from Lecture
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Questions and Answers

What role do intermolecular forces play in determining the mechanical properties of tissues?

  • They are irrelevant to tissue mechanics.
  • They primarily control electrical properties of tissues.
  • They determine the response of tissues to external forces. (correct)
  • They influence only the thermal properties of tissues.

    • How is Hooke's Law related to biological materials?

  • It is unrelated to the behavior of biological materials.
  • It describes the linear relationship between stress and strain in biological tissues. (correct)
  • It applies only to synthetic materials, not biological tissues.
  • It defines the thermal expansion properties of tissues.

    • What is the significance of Young's modulus in the context of biological tissues?

  • It indicates the electrical conductivity of tissues.
  • It measures the thermal resistance of tissues.
  • It represents the elasticity of tissues under stress. (correct)
  • It determines the diffusion rate of substances in tissues.

    • In biomechanics, what does the term 'viscoelasticity' describe about biological tissues?

    <p>Their combined elastic and viscous properties.</p> Signup and view all the answers

    What is the primary cause of deformation in biological tissues?

    <p>Application of external forces.</p> Signup and view all the answers

    What is the primary factor affecting the intermolecular forces within a substance?

    <p>The distribution of positive and negative charges.</p> Signup and view all the answers

    How does Hooke’s Law relate to the mechanical properties of tissues?

    <p>It describes the relationship between stress and strain in elastic tissues.</p> Signup and view all the answers

    In biomechanics, what does Young’s modulus indicate?

    <p>The stiffness or elasticity of a material.</p> Signup and view all the answers

    Young's modulus is a measure used in biomechanics to indicate the stiffness or elasticity of a material. A higher Young's modulus means the material is stiffer, while a lower value indicates more elasticity. What is the primary cause of plastic deformation in biological tissues?

    <p>Permanent deformation due to stress exceeding the elastic limit.</p> Signup and view all the answers

    How is the deformation of a tissue typically characterized in biomechanics?

    <p>By its change in size, shape, or volume under stress.</p> Signup and view all the answers

    What effect does the viscoelastic property of biological tissues have on their mechanical behavior?

    <p>It enhances their ability to resist changes in shape under stress.</p> Signup and view all the answers

    How is the concept of Young's modulus applied in biomechanics?

    <p>To determine the elasticity or stiffness of tissues.</p> Signup and view all the answers

    What is the primary cause of plastic deformation in biological tissues?

    <p>Permanent deformation due to stress exceeding the elastic limit.</p> Signup and view all the answers

    In tissue mechanics, what role does Hooke's Law play?

    <p>It describes the linear relationship between stress and strain in elastic tissues.</p> Signup and view all the answers

    Hooke's Law is fundamental in biomechanics for understanding the behavior of elastic tissues. It describes a linear relationship between the applied stress (force per unit area) and the resulting strain (deformation), which is applicable within the elastic limit of the tissue. What is the significance of deformation types in biomechanical analysis?

    <p>They reveal how tissues respond to different types of external forces.</p> Signup and view all the answers

    What is the primary factor that determines the mechanical properties of tissues in the body?

    <p>The intermolecular forces within the tissue.</p> Signup and view all the answers

    The mechanical properties of tissues, such as elasticity and stiffness, are largely determined by the intermolecular forces within the tissue. These forces influence how tissues respond to external forces and deformations.

    In biomechanics, what does a high Young’s modulus indicate about a material?

    <p>It is very stiff.</p> Signup and view all the answers

    In biomechanics, a high Young's modulus indicates that a material is very stiff. This means the material resists deformation under stress and maintains its shape when subjected to external forces. How do biological tissues typically respond to stresses that exceed their elastic limit?

    <p>They undergo plastic deformation</p> Signup and view all the answers

    What aspect of tissue deformation is described by Hooke's Law?

    <p>The linear relationship between stress and strain.</p> Signup and view all the answers

    In the context of tissue biomechanics, what role does viscoelasticity play?

    <p>It influences how tissues deform under stress over time.</p> Signup and view all the answers

    How does viscoelasticity affect the mechanical behavior of biological tissues?

    <p>It enables tissues to exhibit both elastic and fluid-like properties</p> Signup and view all the answers

    What is the significance of Young's modulus in tissue biomechanics?

    <p>It indicates the stiffness or elasticity of a tissue.</p> Signup and view all the answers

    Young's modulus is a critical parameter in tissue biomechanics, indicating the stiffness or elasticity of a tissue. It quantifies how much a material (tissue) deforms under stress, with higher values indicating stiffer materials. In biomechanics, what is meant by 'plastic deformation' of tissues?

    <p>A permanent change in tissue structure due to stress exceeding the elastic limit.</p> Signup and view all the answers

    Plastic deformation in biomechanics refers to a permanent change in the structure or shape of a tissue when it is subjected to stress levels exceeding its elastic limit, unlike elastic deformation, which is reversible. How does Hooke's Law apply to the deformation of biological tissues?

    <p>It describes the proportionality between stress and strain within the elastic limit.</p> Signup and view all the answers

    What role does the concept of stress-deformation play in biomechanical analysis?

    <p>It determines how tissues respond to different types of external forces.</p> Signup and view all the answers

    What is the primary factor influencing intermolecular forces in biological tissues?

    <p>Distribution of positive and negative charges in molecules.</p> Signup and view all the answers

    How does viscoelasticity impact the response of biological tissues to stress?

    <p>It allows tissues to exhibit both elastic and viscous deformation characteristics.</p> Signup and view all the answers

    In the context of tissue biomechanics, what does Young’s modulus measure?

    <p>Elasticity or stiffness of the tissue.</p> Signup and view all the answers

    What occurs during plastic deformation in biological tissues?

    <p>The tissue undergoes a permanent change in shape or structure.</p> Signup and view all the answers

    How does Hooke's Law relate to tissue deformation under stress?

    <p>It describes the linear relationship between stress and strain within the elastic limit.</p> Signup and view all the answers

    In biomechanics, what factor primarily contributes to the viscoelastic behavior of tissues?

    <p>The presence of water and complex macromolecules within the tissue.</p> Signup and view all the answers

    What does Hooke's Law describe in the context of tissue deformation?

    <p>The linear relationship between stress and strain within the elastic limit.</p> Signup and view all the answers

    How does Young's modulus relate to the mechanical properties of biological tissues?

    <p>It reflects the stiffness or elasticity of the tissue.</p> Signup and view all the answers

    What is the primary cause of plastic deformation in biological tissues?

    <p>Permanent changes due to stress exceeding the elastic limit.</p> Signup and view all the answers

    In biomechanics, what role does the concept of stress-strain curve play?

    <p>It is a graphical representation of a tissue's response to different levels of stress.</p> Signup and view all the answers

    What is the primary role of intermolecular forces in determining the mechanical properties of biological tissues?

    <p>They influence the tissue's response to external stress and deformation.</p> Signup and view all the answers

    In biomechanics, how does Young's modulus relate to tissue elasticity?

    <p>It quantifies the tissue's resistance to deformation under stress.</p> Signup and view all the answers

    What happens when biological tissues undergo plastic deformation?

    <p>They experience permanent changes in shape or structure.</p> Signup and view all the answers

    How does Hooke's Law apply to the elasticity of biological tissues?

    <p>It explains how stress and strain are proportionally related within the elastic limit.</p> Signup and view all the answers

    What is the primary effect of intermolecular forces on the mechanical properties of biological tissues?

    <p>They affect the strength, elasticity, and flexibility of the tissues</p> Signup and view all the answers

    How does Young's modulus relate to the mechanical behavior of biological tissues?

    <p>It indicates the stiffness or elasticity of the tissues.</p> Signup and view all the answers

    What leads to plastic deformation in biological tissues?

    <p>Permanent changes in tissue structure when stress exceeds its elastic limit.</p> Signup and view all the answers

    In tissue mechanics, what is the importance of the stress-strain curve?

    <p>It demonstrates the relationship between applied force and tissue deformation.</p> Signup and view all the answers

    What biomechanical property is characterized by a tissue's response to stress over time?

    <p>Viscoelasticity</p> Signup and view all the answers

    What is the primary factor that influences the mechanical behavior of intermolecular forces in biological tissues?

    <p>The distribution of positive and negative charges within the molecules.</p> Signup and view all the answers

    How does Hooke’s Law relate to the mechanical properties of biological tissues?

    <p>It relates the stress applied to a tissue with its resulting strain.</p> Signup and view all the answers

    In biomechanics, what does Young’s modulus indicate about a material?

    <p>Its stiffness or elasticity.</p> Signup and view all the answers

    What characterizes plastic deformation in biological tissues?

    <p>A permanent deformation when stress exceeds the elastic limit.</p> Signup and view all the answers

    What is the biomechanical significance of the stress-strain curve in tissue analysis?

    <p>It shows the relationship between applied force and tissue deformation.</p> Signup and view all the answers

    What role do intermolecular forces play in determining the mechanical properties of biological tissues?

    <p>They determine the strength, elasticity, and flexibility of the tissues.</p> Signup and view all the answers

    In biomechanics, what does a high Young’s modulus signify about a tissue?

    <p>It is relatively stiff and resists deformation.</p> Signup and view all the answers

    What results in plastic deformation of biological tissues?

    <p>Permanent changes in tissue structure when stress exceeds the elastic limit.</p> Signup and view all the answers

    In the context of biomechanics, how does the concept of viscoelasticity affect the behavior of biological tissues under stress?

    <p>It results in time-dependent strain under constant stress.</p> Signup and view all the answers

    What does anisotropy in biomechanics refer to in the context of biological tissues?

    <p>Directional dependence of mechanical properties.</p> Signup and view all the answers

    How does plastic deformation differ from elastic deformation in biomechanical tissues?

    <p>It represents a permanent change in tissue structure beyond the elastic limit.</p> Signup and view all the answers

    What is the biomechanical significance of hysteresis observed in stress-strain curves of tissues?

    <p>It represents energy loss in the tissue during cyclic loading and unloading.</p> Signup and view all the answers

    In biomechanics, what does a high Young’s modulus indicate about a tissue's properties?

    <p>High stiffness and resistance to deformation.</p> Signup and view all the answers

    What aspect of biomechanics is crucial for understanding the behavior of viscoelastic materials like biological tissues?

    <p>Their time-dependent deformation response to applied stress.</p> Signup and view all the answers

    In tissue mechanics, what does the term 'anisotropy' signify?

    <p>The variable response of tissue to stress depending on the direction of force.</p> Signup and view all the answers

    What does Young's modulus measure in the context of biological tissues?

    <p>The stiffness or elasticity of the tissue.</p> Signup and view all the answers

    How does creep behavior manifest in viscoelastic tissues under constant stress?

    <p>Through gradual deformation over time.</p> Signup and view all the answers

    What is the significance of the stress-strain curve in analyzing the mechanical properties of tissues?

    <p>It represents the relationship between applied force and deformation.</p> Signup and view all the answers

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