Define modulus of elasticity, stiffness, brittleness, and ductility
What will be an ideal response?
ANS: The modulus of elasticity is the ratio of stress to strain at any point in the stress-strain curve. A
large applied load that results in only a small deformation will have a high modulus of elasticity.
The steeper the stress-strain curve, the higher is the modulus of elasticity. Because the material
does not readily respond to an applied load, it is considered stiff (therefore, stiffness is equivalent
to the modulus of elasticity). A tissue is brittle when the plastic region is very small or
absentâ€"that is, the material undergoes very little deformation prior to ultimate failure. A ductile
material, in contrast, can undergo considerable deformation prior to failure.
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A) Endocrine B) Sensory C) Muscular D) Nervous
Which structure form the lower two-thirds of the nose?I. Lateral nasal cartilageII. Lesser and greater alar cartilagesIII. Septal cartilageIV. Fibrous fatty tissue ?
A. Lateral nasal cartilage B. Lesser and greater alar cartilages C. Septal cartilage D. Fibrous fatty tissue
The classification systems usually used to distinguish races are based on
A. genetic traits that determine distinct behavior patterns. B. the same ideas and criteria in every major culture around the world. C. continuous rather than discrete traits. D. the idea that there are three main races.
When evaluating the mechanism of injury of a car-versus-pedestrian collision, you should first:
A. approximate the speed of the vehicle that struck the pedestrian. B. determine if the patient was propelled away from the vehicle. C. evaluate the vehicle that struck the patient for structural damage. D. determine if the patient was struck and pulled under the vehicle.