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Bio Engineering

Subject : engineering
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
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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. Drawback of micromaching

2. Keloid scars forms because disfuntion of

3. Enzyme that really gets the polmerization going!

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

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

6. Thrombin also activates protein C-- which deactivates earlier factors in the cascade is known as ___ ___.

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

8. 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?

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

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

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

12. List two chemical characteristics of polymers:

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

14. Where are the tissue factors found when they're inactivated

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

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

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

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

19. This type of feedback creates

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

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

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

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

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

25. ____ are enzymes responsible for protein degradation.

26. Condition in which patients can literally bleed to death.

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

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

29. ____ grafts are derived from the other humans.

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

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

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

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

34. The two types of white blood cells:

35. Cells that proliferate rapidly (fibroblasts)

36. Cells that don't proliferate (neurons)

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

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

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

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

41. High conductivity - isotropic - crystalline

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

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

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

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

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

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

48. 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.

49. Cardiac bypass surgery in which a vein from a patient's leg is transplanted to the patient's heart is an example of the us of ____ tissue.

50. Mast cells release this