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Bio Engineering

Subject : engineering
  • Answer 50 questions in 15 minutes.
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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. Addition polymerization is commonly initiated by ___ - atoms that have an unpaired electron.

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

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

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

5. High conductivity - isotropic - crystalline

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

7. This type of feedback creates

8. Keloid scars form due to disfunction of ____.

9. Enzyme that really gets the polmerization going!

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

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

12. ____ are enzymes responsible for protein degradation.

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

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

15. Mast cells release this

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

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

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

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

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

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

22. Cells that proliferate rapidly (fibroblasts)

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

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

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

26. Keloid scars forms because disfuntion of

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

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

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

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

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

32. 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?

33. Thrombin activates several upstream factors.

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

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

36. ______ Molecular weight degrades slower than lower MW

37. Cells that don't proliferate (neurons)

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

39. 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.

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

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

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

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

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

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

46. ____ grafts are derived from the other humans.

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

48. Drawback of micromaching

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. The two types of white blood cells: