Quiz 1 Material Flashcards
What is synathroses
Immovable joints (fibrous ) such as sutures and gomphosis
Ampiarthoses
Slightly movable (cartilaginous) , pubic symphyses , syndesmoses( coracol acromial joint ) and synchondroses ( ribs + sternum )
Diarthroses
Freely movable 6 types hinge ball socket etc
Prep+ deceleration
Eccentric
Acceleration + acceleration
Concentric
Follow thru and deceleration
Eccentric
Kinetics
Force , torque , and moment arms
Stress is
Distributed force expressed as pressure
Strain is
Measurement of deformation
Strain rate
Rate at which deformation loads r applied
Visco elasticity
Characteristics of fluid and solid properties
Tension and compression together lead to
Bending
Bone is made of
Minerals such as calcium and phosphate and protein like collagen
Structure of cortical bone (middle part )
Non porous , dense and stiff
Structure of trabecular bone (end of bone )
Porous , less dense contributes to flexibility
Bone growth is
Longitudinal and circumferential ( osteoblast and clast cells ) ( building and absorbing )
What does wolf’s law say about bone
bone strength increases as bone force increases
Stiffness of bone means
High load low deformation
Flexible bone means
Low load high deformation
Elastic region can
Go back to regular shape after force is applied
Plastic region
Is stuff , defining point is yielding point
T/F - bone will sustain microfractures under low repetitive loading
True
When does fracture occur
When remodeling is outpaced by fatigue process
Role of muscle activity on bone stress
Bone experiences compression both upward and downward, so muscle can level this out by tension , pulling the bone is opposite direction of compression force
Ligaments and tendons
Lig = bone to bone and tendons =muscle to bone
