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






2. The fatigue limit is the ___ below which the material can withstand an infinite number of cycles without failure






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






4. The process of calibration establishes a quantitative relationship between ____ __ ___ _____ and the direct output of the intstrument (for example time/volume in GPC).






5. _____ establishes a quantitative relationship between measured output values from an instrument and known standards of what is being measured.






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






7. Mast cells release this






8. ____ are enzymes responsible for protein degradation.






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






10. High conductivity - isotropic - crystalline






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






12. Addition polymerization is commonly initiated by ___ - atoms that have an unpaired electron.






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






14. Activates tissue factors aka endothelial damage






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






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






17. The glass transition temperature of a poymer at which a polymer transforms from a ____ state to a ___ state.






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






19. Classify the following polymers into appropriate families based on their bond structure i.e. the polymer is an example of poly ____.






20. The formation of rust due to corrosion in the body is due to the reaction between these 3 things ____ - ____ - and ____ .






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






22. Keloid scars form due to disfunction of ____.






23. Neutrophils remove bacteria/damaged cell debris from a wound site through the process of ___.






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






25. 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?






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






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






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






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






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






31. Thrombin activates several upstream factors.






32. The fatigue limit is the ___ below which the material can withstand an infinite number of cycles without failure.






33. ____ describes the ability of a device to function appropriately in the presence of blood.






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






35. This type of feedback creates






36. List two chemical characteristics of polymers:






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






38. Cells that don't proliferate (neurons)






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






40. 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.






41. The fatigue limit is value of applied stress below which a material will not fail no matter the number of ____ applied.






42. Higher Molecular weight degrades slower than ____ MW






43. Deformation that cannot be recovered once the load is removed from the material is ____ deformation.






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






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






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






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






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






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






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