random Flashcards
mononucleare cells that come from bone marrow to form new bone is a …
osteoblasts
example of hyaline cartilage is
trachea, tips of ribs
in standard anatomical position, the ulna and radius are located
medial and lateral respectively
the longitudinal modulus of an avg human femoral cortical bone is
17, 000 MPa
a neck to shaft angle of less than 125
coxa vara
the rigidity of an external fixator can be regulated by the following
- # of pins
- distance b/w bone and rod
- diameter of pins
turning the sole medially and laterally is …
inversion and eversion respectively
organic composition of bone matrix is mainly composed of
type 1 collagen
example of connective tissue proper
articular cartilage
intervertebral disk
tendon
the stress of a one material beam is independent of material properties when…
uniform xsection area
exhibits elastic behavior
applied stress is const
the mechanical behavior of articular cartilage is a function of
- intrinsic, flow independent behavior of the collagen-PG matrix
- flow of interstitial fluid through the matrix and its resistance
swelling caused by ionic phase
during gait, the superior eccentricity of the trabecular bone within the femoral neck tends to
reduce internal effective moment produced by the joint contact force
when preforming squats with a load, what type of contraction are the quads achieving when the athlete is going down?
eccentric contraction
eccentric contraction
lengthening of muscles (downward of bicep curl)
concentric contraction
shortening of muscle (upward of bicep curl)
isometric contraction
holding muscles stationary when in use (pausing in curl)
the main mechanical distinction between a tendon and ligament is …
ultimate tensile strain
toe region of a stress strain
stiffness of the tissue
example of gliding joint
wrist joint
cortical bone screw is distinct by the following ….
fine threads
example of sesamoid bone
patella
appendicular skeleton includes
of the upper and lower extremities, which include the shoulder girdle and pelvis
concave curvatures within the vertebral column
lumbar and cervical
convex curvatures of the vertebral column
sacral and thoracic
aggregate compressive modulus of a cartilage is a ratio of…
equilibrium compressive stress over equilibrium compressive strain
synovial joints may have what kind of reinforced ligament
intracapsular and extracapsular and ?capsular?
what articular cartilage zone are the chondrocytes arranged in columnar fashion and perpendicular orientation?
deep zone
ratio of mass to volume of the actual bone tissue ( excluding porosity) is?
material tissue density
turning your head side to side is a motion about the ….. plane
transverse
what type of bone is mechanically strong and formed by regular alignment of collagen into sheets 1 month after birth
lamellar
for subcapital fractures, Pauwels classification of type 3 is ….
fracture with an obliquity ranging of 70 or more degrees
avg tensile strain for a human tendon is
10-60%
avg tensile strain for a ligament is
10-120%
an example of striated and involuntary muscle tissue is
cardiac muscle
two types of bone healing; primary healing is associate with
direct osteon bridging
single limb stance is associated with
midstance, terminal stance
dynamic hip screw is one type of hip fracture treatment; it is used under the following condition
extracapsular fracture
presence of shear stress
what is a fossa
elongated basin
advantage of total hip resurfacing
similar size to natural femoral head
excessive posterior curvature of the thoracic region is identified as…
krphosis
