Test your basic knowledge |

Bio Engineering

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. The fatigue limit is value of applied stress below which a material will not fail no matter the number of ____ applied.






2. Higher Molecular weight degrades slower than ____ MW






3. Collagen ____ is responsible for the gradual gain in mechanical properties of wounded tissue between roughly 4 and 52 weeks post- injury.






4. Two things needed in the end product of the creation of a scab






5. Essentially all metallic biomaterials are ____ - comprised of two or more metals. One of these metals is selected for its ability to support _____ - the formation of a stable oxide layer that resists further corrosion.






6. The fibrous capsule surrounding a permanent implant is primarily composed of ___ cells and ____ (matrix).






7. The calculation of a polymer's molecular weight (weight average and number number average) is based upon values for ____ and ___.






8. Relative to free radical polymerization - condensation polymerization generally produces polymer of relatively ____ molecular weight.






9. Is directed cell migration in response to a concentration gradient of soluble molecules.






10. Activates tissue factors aka endothelial damage






11. Mast cells release this






12. Cell found in the lining of the blood vessels that release heparin and are a part of the negative feedback system.






13. Cells that don't proliferate (neurons)






14. List two chemical characteristics of polymers:






15. Keloid scars form due to disfunction of ____.






16. A condensation polymerization results with an ester bond between two reactants and this comes off as a result






17. What types of wound healing results from injury with inflammation?






18. A molecular pathway in which the product of each reaction catalyzes the subsequent reaction.






19. Enzymes (proteins) are not activated only when they are in contact with this type of cells






20. Process of producing new blood vessels due to a lack on oxygen and thus inducing VEGF.






21. The trigger for activation of enzymes (anything but endothelial cells!)






22. During granulation stage of proliferation - growth factors that produce this ____(answer)_____ that function in degrading fibrin and replacing it with collagen.






23. ____ are enzymes responsible for protein degradation.






24. ____ is a measurement that characterizes the breadth of the distribution of a polymer's molecular weight.






25. This type of feedback creates






26. You're working on a square polymeric implant of 5cm length and 2mm thick. You've been asked to suggest a precise way to fabricate it - what would you suggest?






27. Process that makes long fibers (fiber drawing) by forcing a fluid through an oriface.






28. Are polymer additives used to lower glass transition temperature temperature.






29. Foreign body giants cells are produced by fusion of ___.






30. Cells that proliferate rapidly (fibroblasts)






31. Type of fiber drawing that controls details of a polymer by etching on a microscopic level; thus - controlling mechanical properties as well






32. ____- are polymers that can be repeatedly softened by heating and hardened by cooling.






33. ____ binds to anti- thrombin III (thrombin inhibitor) and increases its potency 1000- fold.






34. Polyethylene oxide grafting to biomaterials was developed to prevent coagulation by interfering with/preventing ___ ___.






35. No healing of damage neurons is the result of ____ cells that are not able to ____.






36. Disfunction of _____ (cells) producing collagenase during the _____ phase of wound healing may form Keloid scars.






37. Vascular endothelial growth factor is produced in response to ___ and stimulates ___.






38. Which of polyermization (condensation/free radical) would you choose to obtain a polymer of high molecular weight?






39. Enzyme that really gets the polmerization going!






40. This cleaves into fibrinogen which creates fibrin (a sticky enzyme that allows blood to clot)






41. GPC separates molecules on the basis of size by their passage over a column packed with a porous matrix. ___ molecules pass through the column more quickly.






42. Rather than randomly moving - moves in a directed cell migration manner for specific functions.






43. ____ grafts are derived from the other humans.






44. Resulting from the build up of too much collagen at the surface of injury during the granulation tissue stage of proliferation






45. ____ is the process by which cells involved in inflammation internalize and destroy foreign material.






46. Cells that proliferate slowly over time (aka liver)






47. Damaged cells at the site of injury (mast cells) release ___ (glycosaminoglycan).






48. In order to produce a blood clot - thrombin cleaves/activates ____ and ____.






49. ______ Molecular weight degrades slower than lower MW






50. What type of materials are used for photolithography? (substrate is a silicon wafer - built up material is some _____ ____ )