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