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Test your basic knowledge |
Bio Engineering
Start Test
Study First
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. Deformation that cannot be recovered once the load is removed from the material is ____ deformation.
heparin
Plastic
cycles
Lower
2. During granulation stage of proliferation - growth factors that produce this ____(answer)_____ that function in degrading fibrin and replacing it with collagen.
low
Regeneration/Repair
Proteases
Hemocompatibility
3. Resulting from the build up of too much collagen at the surface of injury during the granulation tissue stage of proliferation
scars
negative feedback
Free Radical
Thrombin
4. A molecular pathway in which the product of each reaction catalyzes the subsequent reaction.
micromachining
Enzyme cascade
labile cells
Proteases
5. A ____ implant is designed to elicit specific - intended to host responses.
Protein Absorption
Enzyme cascade
fibrinogen - factor XIII
Bioactive
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.
heparin
Phagocytosis
alloys - passivation
Chemotaxis
7. Are polymer additives used to lower glass transition temperature temperature.
fibrinogen - factor XIII
Plasticizers
Metals
Endothelial cells
8. The fibrous capsule surrounding a permanent implant is primarily composed of ___ cells and ____ (matrix).
photoactive polymers
Higher
Mast - Collagen
hypoxin - angiogenesis
9. Mast cells release this
heparin
cross - linking
Plastic
Collagenase/Remodelling
10. High conductivity - isotropic - crystalline
Large
Mast - Collagen
Metals
binding
11. Keloid scars form due to disfunction of ____.
Enzyme cascade
alloys - passivation
Collagenase/Remodelling
Polymers - cross linking of polymers
12. The fatigue limit is the ___ below which the material can withstand an infinite number of cycles without failure.
standards of known properties
Polydesperity index
stress
Plastic
13. Process that makes long fibers (fiber drawing) by forcing a fluid through an oriface.
Protein Absorption
Thrombin
Lower
Extrusion
14. Cells that proliferate rapidly (fibroblasts)
Compression molding
negative feedback
Proteases
labile cells
15. The two types of white blood cells:
Bioactive
Metals
neutrophils - macrophages
Protein Absorption
16. The formation of rust due to corrosion in the body is due to the reaction between these 3 things ____ - ____ - and ____ .
Hemocompatibility
Extrusion
Have to be in a clean room free of dust and biocontamination - expensive
Water - oxygen - metal
17. This cleaves into fibrinogen which creates fibrin (a sticky enzyme that allows blood to clot)
Lower
Thermoplastics
Thrombin
glassy to rubbery
18. Is directed cell migration in response to a concentration gradient of soluble molecules.
neutrophils - macrophages
Chemotaxis
free radical
heparin
19. Enzymes (proteins) are not activated only when they are in contact with this type of cells
labile cells
Macrophages
Proteases
Endothelial cells
20. ______ Molecular weight degrades slower than lower MW
mast cells
Higher
Allogeneic
Collagenase
21. The glass transition temperature of a poymer at which a polymer transforms from a ____ state to a ___ state.
Stable cells
photoactive polymers
Allogeneic
glassy to rubbery
22. Collagen ____ is responsible for the gradual gain in mechanical properties of wounded tissue between roughly 4 and 52 weeks post- injury.
hypoxin - angiogenesis
cross - linking
scars
in cytoplasm
23. List two chemical characteristics of polymers:
glassy to rubbery
Protein Absorption
Stable cells
Intermolecular bonding - molecular weight
24. What type of materials are used for photolithography? (substrate is a silicon wafer - built up material is some _____ ____ )
Extrusion
Macrophages
labile cells
photoactive polymers
25. Foreign body giants cells are produced by fusion of ___.
phagocytosis
Macrophages
Thrombin
alloys - passivation
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.
Large
Bioactive
Regeneration/Repair
heparin
27. ____ is a measurement that characterizes the breadth of the distribution of a polymer's molecular weight.
Polydesperity index
chemotaxis
low
Lower
28. Enzyme that really gets the polmerization going!
Endothelial cells
autologous
Thrombin
Lower
29. Where are the tissue factors found when they're inactivated
Metals
free radical
in cytoplasm
Permanent cells
30. Classify the following polymers into appropriate families based on their bond structure i.e. the polymer is an example of poly ____.
Amide
mast cells
stress
Compression molding
31. No healing of damage neurons is the result of ____ cells that are not able to ____.
Lower
macrophages - proliferation
Permanent - replicate
fibrinogen - factor XIII
32. ____- are polymers that can be repeatedly softened by heating and hardened by cooling.
Water
Higher
Thermoplastics
Number of polymers - molecular weight of polymer
33. Polyethylene oxide grafting to biomaterials was developed to prevent coagulation by interfering with/preventing ___ ___.
Protein Absorption
Compression molding
Proteases
Chemotaxis
34. ____ grafts are derived from the other humans.
Higher
Plastic
Allogeneic
fibrinogen - factor XIII
35. Condition in which patients can literally bleed to death.
Hemocompatibility
Heparin
Intermolecular bonding - molecular weight
Hemophilia
36. The trigger for activation of enzymes (anything but endothelial cells!)
heparin
Phagocytosis
binding
Endothelial cells
37. Drawback of micromaching
Have to be in a clean room free of dust and biocontamination - expensive
cross - linking
macrophages - proliferation
Plasticizers
38. Activates tissue factors aka endothelial damage
Regeneration/Repair
Extrusion
Damage to cell membranes
photoactive polymers
39. ____ describes the ability of a device to function appropriately in the presence of blood.
Polydesperity index
Higher
binding
Hemocompatibility
40. Cells that don't proliferate (neurons)
Bioactive
Permanent cells
Proteases
fibrinogen - factor XIII
41. ____ binds to anti- thrombin III (thrombin inhibitor) and increases its potency 1000- fold.
micromachining
Heparin
Large
Positive Feedback
42. Type of fiber drawing that controls details of a polymer by etching on a microscopic level; thus - controlling mechanical properties as well
Proteases
low
standards of known properties
micromachining
43. ____ are enzymes responsible for protein degradation.
Proteases
labile cells
binding
Number of polymers - molecular weight of polymer
44. A condensation polymerization results with an ester bond between two reactants and this comes off as a result
scars
Water
Polydesperity index
heparin
45. Thrombin activates several upstream factors.
low
Positive Feedback
Polymers - cross linking of polymers
Chemotaxis
46. The fatigue limit is value of applied stress below which a material will not fail no matter the number of ____ applied.
Regeneration/Repair
cycles
Hemocompatibility
Water
47. What types of wound healing results from injury with inflammation?
Regeneration/Repair
hypoxin - angiogenesis
Thermoplastics
Allogeneic
48. _____ establishes a quantitative relationship between measured output values from an instrument and known standards of what is being measured.
autologous
Calibration
Number of polymers - molecular weight of polymer
Water - oxygen - metal
49. Which of polyermization (condensation/free radical) would you choose to obtain a polymer of high molecular weight?
Proteases
Free Radical
angiogenesis
Stable cells
50. Keloid scars forms because disfuntion of
neutrophils - macrophages
Collagenase
Intermolecular bonding - molecular weight
Plastic