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

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

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

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

5. 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.

6. 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.

7. Cells that proliferate rapidly (fibroblasts)

8. List two chemical characteristics of polymers:

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

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

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

12. Higher Molecular weight degrades slower than ____ MW

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

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

15. ____ are enzymes responsible for protein degradation.

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

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

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

19. Mast cells release this

20. Thrombin activates several upstream factors.

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

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

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

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

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

26. 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.

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

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

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

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

31. High conductivity - isotropic - crystalline

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

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

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

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

36. Keloid scars form due to disfunction of ____.

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

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

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

40. Enzyme that really gets the polmerization going!

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

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

43. Activates tissue factors aka endothelial damage

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

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

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

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

48. This type of feedback creates

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

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