USAHS Biomechanics Unit 3 Exam Questions with 100% Correct Answers 2024/2025 Update
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USAHS Biomechanics
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USAHS Biomechanics
USAHS Biomechanics Unit 3 Exam Questions with 100% Correct Answers 2024/2025 Update
What is resilience? - Answer- The property of a tissue to absorb energy when it is elastically deformed and then, upon unloading, to have this energy vigorously recovered
What is tissue damping? - Answer- The...
USAHS Biomechanics Unit 3 Exam
Questions with 100% Correct
Answers 2024/2025 Update
What is resilience? - Answer- The property of a tissue to absorb energy when it is
elastically deformed and then, upon unloading, to have this energy vigorously recovered
What is tissue damping? - Answer- The property of a tissue to absorb energy and the
rate and amount of energy that is dissipated when the tissue is elastically deformed
(T/F): tissue damping is the opposite of resilience. - Answer- True
How do you calculate tissue damping? - Answer- D = 1 - resilience
Viscoelastic materials are _____ to recover their original shape/length in comparison to
purely elastic materials. - Answer- slower
What is strength? - Answer- Strength of material is the maximum stress that a material
can withstand before it fails or before it breaks
What is toughness? - Answer- The amount of energy per volume that a material can
absorb before rupturing/failing
How is toughness measured? - Answer- By considering the total area under the stress-
strain curve
(T/F): toughness is not necessarily equal to strength. - Answer- True
If the total area under the stress strain curve is low, this indicates _____. On the other
hand, if the total area is high, this indicates _____. - Answer- fragility, toughness
If the total area under the stress strain curve has a larger strain, this indicates that the
tissue is _____. On the other hand, if the total area has a larger stress, this indicates
that the tissue is stronger. - Answer-
(T/F): materials with a high deformation percentage are most likely to fail. - Answer-
True
, (T/F): materials with a high magnitude of stress are most likely to fail. - Answer- True
What is the purpose of elastin? - Answer- To provide tissues some of their elastic
resilience
Which connective tissue first begins to lose its properties as we age? - Answer- Skeletal
muscle
Which connective tissue maintains most of its strength/properties as we age? - Answer-
Tendons
In what order do our connective tissues begin to decrease/lose their mechanical
properties as we age? - Answer- skeletal muscle, cartilage, bone, tendon
What connective tissue has the greatest stiffness? (Young's Modulus) - Answer-
Cortical bone
What connective tissue has the least stiffness? (Young's Modulus) - Answer- Elastin
What connective tissue yields the greatest stress? - Answer- Cortical bone
What connective tissue yields the least stress? - Answer- Elastin
What connective tissue has the highest maximal strain to failure? - Answer- Elastin
What connective tissue has the lowest maximal strain to failure? - Answer- Collagen
fibers and tendons
What are the four mechanical functions of tendons? - Answer- 1. muscle to bone
connection
2. transfer tensile forces between muscle and bone
3. provide energy storage and return
4. provide damping effects
What are the two mechanical functions of ligaments? - Answer- 1. augment the
mechanical stability of joints beyond that provide muscle forces and joint geometry
2. prevent excessive or unwanted joint motions
What cells produce collagen in ligaments? - Answer- Fibroblasts
What cells produce collagen in tendons? - Answer- Tenoblasts
The elastin content of which connective tissue contains more collagen? - Answer-
Ligaments (up to 2x the amount)
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