EXSS 288 Final Test Questions with Correct Answers

EXSS 288 Final Test Questions with Correct Answers What is tissue stress? - Answer-Magnitude of the applied mechanical force deformation What is a tissue Strain? - Answer-quantity of deformation response to applied force What is mechanical stress? - Answer-internal or external force acting on tissue What are the 5 types of mechanical stresses? - Answer-1. Tension 2. Compression 3. Shear 4. Bending 5. Torsion What does the degree of deformation depend on? - Answer--tissue composition -speed of applied load -frequency of loading -direction of loading Axial stress is? - Answer-Stress on the long vertical axis What does tension do? - Answer-Creates a pulling action trying to elongate the structure example: tendon: muscle and bone attachment pull in opposite directions ligament: 2 bone attachments pull in opposite direction What does compression do? - Answer-Creates a pushing action tending to shorten the structure example: Ground and weight of the body push bones together What is shear force? - Answer-Forces that act parallel to cross the section or surface of a body ***the two forces are in opposite directions*** examples: pelvis during walking ground pushes up on the body (i.e. standing leg) Gravity push down on the limb in swing phase What is bending? - Answer-Loading about an axis - Combination of tension and compression