Biomech

Biomechanics Quiz

Test your knowledge on the fascinating field of biomechanics with our comprehensive quiz! This quiz consists of 72 multiple-choice questions that cover various topics, including structural properties, mechanical behavior of bones, and joint functions. Whether you are a student, teacher, or enthusiast, this quiz is designed to challenge and enhance your understanding.

Explore topics related to bone, tendons, and cartilage.
Assess your understanding of crucial biomechanical concepts.
Perfect for both learning and reinforcing knowledge in biomechanics.

72 Questions18 MinutesCreated by AssessingBone300

If we are solving a force system analysis questions and we assume the system is 2D and static, we can solve for how many unknowns?

When asked to solve for the force in the tibia-femoral joint, which of the following is not a possible system of interest?

Tibia

Femur

Thigh

Patella

As the rate of loading decreases:

Bone becomes less brittle

Bone becomes more brittle

Bone becomes stiffer

Bone becomes less compliant

Constant compression in bone results in

During adolescence, in comparison to males, females

Have higher total bone mass

Have a higher peak in bone mass gain

Have a later peak in bone mass gain

Have an earlier peak in bone mass gain

During running, impact forces

Are a major source of injuries

Can be reduced by using softer shoes

Are higher than active forces

Increase with increasing running speed

None of the above

As we age, the largest decrease in bone occurs in

In cartilage, collagen is oriented perpendicular to the surface in __ zone and parallel to the surface in __ zone

Which of the following are possible effects of forces

When using the resultant forces and moments approach in force system analysis

The resultant moments are always equal to zero

The sum of the resultant moments are always equal to zero

The resultant moments are never equal to zero

The sum of the resultant moments are never equal to zero

None of the above

Elastic modulus of biological tissues depends on

When a bone is subjected to an excessive bending stress

It fails in the middle of the bone

It fails at the side of compressive stress

It fails at the side of sheer stress

It fails at the side of tensile stress

It fails at the side of torsional stress

Compared to the bones of a 20 year old male, the ultimate compressive stress of bones of an average 60 year old male is

Ultimate stress indicates

The slope of the stress-strain curve in the elastic region

The transition point from the elastic region to the plastic region

The maximal stress that the structure can sustain

The failure load

On the ascending limb of the force length relationship

Force increases as length increases

Force decreases as length increases

Force stays constant as length increases

Force is independent of length

All of the following are true EXCEPT

Cortical bone is about 20 times stronger than cancellous bone

Trabecular bone makes up about 20% of skeletal mass

Cortical bone has a high rate of remodelling

Trabecular bone can typically be found at the end of long bones

Cortical bone can typically be found at the diaphysis of long bones

A muscle fibre is stretched until failure. It's elastic modulus and failure strain are 10^6 (elastic modulus SI unit) and 5% respectively. The failure stress is:

Ligaments and tendons differ in

Ligaments and tendons don't differ

The amount/type of water

The amount/type of collagen

The amount/type of extracellular matrix

The amount/type of cellular material

When a boy is running, if his femur is rotating at a constant velocity it must:

Have a net resultant force equal to zero

Have a net resultant force not equal to zero

Have a net resultant moment equal to zero

Have a net resultant moment not equal to zero

Ultimate stress indicates

The slope of the stress-strain curve in the elastic region

The transition point from the elastic region to the plastic region

The maximal stress that the structure can sustain

The failure load

Young's modulus

Is the slope of the force-deformation curve

Increases in compliant compared to stiffness

Is higher in skeletal muscles compared to bone

None of the above

According to Wolff's law

Bone is a viscoelastic material

Mechanical properties of bone depend on its porosity

Bone remodels itself according to the mechanical stresses it experiences

In response to a creep test, articular cartilage experiences

A slow initial increase then a rapid increase in force

A rapid increase then a slow increase in deformation

A slow initial increase then a rapid increase in deformation

A rapid initial increase then a slow increase in force

As we age, bone (compared to young age)

Becomes more ductile because its amount of collagen fibres increases

Becomes more ductile because its mineral density increases

Becomes less ductile because its amount of collagen fibres decreases

Becomes less ductile because its mineral density decreases

Which of the following is not a function of ligaments

To attach articulating bones to one another

To guide movement

To maintain joint congruity

To transfer loads

The following statements are true except:

Cells in articular cartilage are the chondrocytes

Stiffness in articular cartilage decreases with increasing strain

Proteoglycans in articular cartilage resist compressive stresses

Chondrocytes can sense mechanical load

Permeability in articular cartilage

Is independent of the amount of strain

Increases when strain increases

Causes an increase in stiffness when it decreases

None of the above

Strain is:

Force per initial length

Deformation per initial length

Deformation per cross sectional area

Force per cross sectional area

Viscoelastic material:

Becomes elastic if loaded at high speeds

Relaxes its deformation when submitted to a constant load

Is able to return to its original shape after stretch beyond the yield point

Has time dependent response to loading

Osteoporosis is

Less common as people age

Might be caused by repetitive impact loading and abnormal loading

A degenerative disease of osteon

An increase in bone strength

Which of the following activities would produce the greatest increase in bone mineral density

Cycling

Swimming

Running

All of the above would provide equal contribution to bone health

In the plastic region of the stress-strain curve

Permanent deformation occurs

An elastic modulus can be determines

Force is inversely proportional to deformation

The behaviour of a material is elastic

The statement that better describes the plateau region of the force-length relationship is:

Force increases with length

Force decreases with length

Force is independent of length

Force increases as length stays constant

As the elbow flexes, active force produced by the biceps brachii:

Decreases because the length of the biceps brachii decreases

Increases because the length of the biceps brachii decreases

Stays the same

Could increase or decrease depending on its operating length

The following figure shows the effect of daily stress on a bone

A is bone deposition by the osteoclasts and B is bone resorption by the osteoblasts

A is bone resorption by the osteoblasts and B is bone deposition by the osteoclasts

A is bone resorption by the osteoclasts and B is bone deposition by the osteoblasts

A is bone deposition by the osteoblasts and B is bone resorption by the osteoclasts

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