SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
|
Email
Search
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. Addition polymerization is commonly initiated by ___ - atoms that have an unpaired electron.
Extrusion
Damage to cell membranes
fibrinogen - factor XIII
free radical
2. Rather than randomly moving - moves in a directed cell migration manner for specific functions.
free radical
phagocytosis
chemotaxis
heparin
3. _____ establishes a quantitative relationship between measured output values from an instrument and known standards of what is being measured.
Plastic
Stable cells
Calibration
heparin
4. Which of polyermization (condensation/free radical) would you choose to obtain a polymer of high molecular weight?
Free Radical
cross - linking
autologous
glassy to rubbery
5. List two chemical characteristics of polymers:
Intermolecular bonding - molecular weight
fibrinogen - factor XIII
Thermoplastics
Free Radical
6. Cells that proliferate slowly over time (aka liver)
Enzyme cascade
Proteases
micromachining
Stable cells
7. Type of fiber drawing that controls details of a polymer by etching on a microscopic level; thus - controlling mechanical properties as well
free radical
Permanent cells
Macrophages
micromachining
8. During granulation stage of proliferation - growth factors that produce this ____(answer)_____ that function in degrading fibrin and replacing it with collagen.
Negative Feedback
Thrombin
Thermoplastics
Proteases
9. The fatigue limit is the ___ below which the material can withstand an infinite number of cycles without failure
Stress
Calibration
angiogenesis
Hemophilia
10. Enzyme that really gets the polmerization going!
Large
Thrombin
Metals
Endothelial cells
11. Thrombin also activates protein C-- which deactivates earlier factors in the cascade is known as ___ ___.
Negative Feedback
Number of polymers - molecular weight of polymer
stress
Permanent - replicate
12. The two types of white blood cells:
Hemophilia
mast cells
Free Radical
neutrophils - macrophages
13. Foreign body giants cells are produced by fusion of ___.
Macrophages
Phagocytosis
Plastic
Amide
14. Classify the following polymers into appropriate families based on their bond structure i.e. the polymer is an example of poly ____.
Permanent cells
Compression molding
Amide
Positive Feedback
15. ____ binds to anti- thrombin III (thrombin inhibitor) and increases its potency 1000- fold.
Permanent - replicate
Thrombin
fibrinogen - factor XIII
Heparin
16. Process that makes long fibers (fiber drawing) by forcing a fluid through an oriface.
Extrusion
Stable cells
low
Endothelial cells
17. Thrombin activates several upstream factors.
Hemocompatibility
Thrombin
Positive Feedback
stress
18. Mast cells release this
Large
Polymers - cross linking of polymers
heparin
Enzyme cascade
19. Disfunction of _____ (cells) producing collagenase during the _____ phase of wound healing may form Keloid scars.
macrophages - proliferation
Permanent - replicate
Stress
chemotaxis
20. Cell found in the lining of the blood vessels that release heparin and are a part of the negative feedback system.
Extrusion
Enzyme cascade
Stable cells
mast cells
21. Condition in which patients can literally bleed to death.
photoactive polymers
chemotaxis
low
Hemophilia
22. No healing of damage neurons is the result of ____ cells that are not able to ____.
Free Radical
Permanent - replicate
glassy to rubbery
Thrombin
23. The formation of rust due to corrosion in the body is due to the reaction between these 3 things ____ - ____ - and ____ .
Macrophages
Water - oxygen - metal
phagocytosis
fibrinogen - factor XIII
24. ____ are enzymes responsible for protein degradation.
micromachining
alloys - passivation
Mast - Collagen
Proteases
25. The process of calibration establishes a quantitative relationship between ____ __ ___ _____ and the direct output of the intstrument (for example time/volume in GPC).
standards of known properties
Water - oxygen - metal
Endothelial cells
phagocytosis
26. In order to produce a blood clot - thrombin cleaves/activates ____ and ____.
Damage to cell membranes
fibrinogen - factor XIII
Mast - Collagen
cycles
27. High conductivity - isotropic - crystalline
neutrophils - macrophages
Metals
Collagenase
Free Radical
28. The fatigue limit is the ___ below which the material can withstand an infinite number of cycles without failure.
Water - oxygen - metal
labile cells
glassy to rubbery
stress
29. Cells that proliferate rapidly (fibroblasts)
labile cells
Chemotaxis
chemotaxis
neutrophils - macrophages
30. Drawback of micromaching
Intermolecular bonding - molecular weight
Enzyme cascade
Stress
Have to be in a clean room free of dust and biocontamination - expensive
31. Damaged cells at the site of injury (mast cells) release ___ (glycosaminoglycan).
Proteases
photoactive polymers
Calibration
heparin
32. 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
Amide
Protein Absorption
Macrophages
33. What types of wound healing results from injury with inflammation?
Regeneration/Repair
photoactive polymers
standards of known properties
Higher
34. Higher Molecular weight degrades slower than ____ MW
Lower
negative feedback
Positive Feedback
hypoxin - angiogenesis
35. Cells that don't proliferate (neurons)
stress
Polydesperity index
Permanent cells
Water - oxygen - metal
36. Collagen ____ is responsible for the gradual gain in mechanical properties of wounded tissue between roughly 4 and 52 weeks post- injury.
Calibration
Endothelial cells
Proteases
cross - linking
37. Relative to free radical polymerization - condensation polymerization generally produces polymer of relatively ____ molecular weight.
in cytoplasm
Bioactive
binding
low
38. Vascular endothelial growth factor is produced in response to ___ and stimulates ___.
Hemocompatibility
hypoxin - angiogenesis
Hemophilia
Bioactive
39. Enzymes (proteins) are not activated only when they are in contact with this type of cells
Endothelial cells
Chemotaxis
Thrombin
Bioactive
40. Activates tissue factors aka endothelial damage
Chemotaxis
Protein Absorption
Damage to cell membranes
Heparin
41. The calculation of a polymer's molecular weight (weight average and number number average) is based upon values for ____ and ___.
Number of polymers - molecular weight of polymer
Polydesperity index
Chemotaxis
Lower
42. Polyethylene oxide grafting to biomaterials was developed to prevent coagulation by interfering with/preventing ___ ___.
Regeneration/Repair
stress
Thrombin
Protein Absorption
43. ______ Molecular weight degrades slower than lower MW
cycles
Higher
Extrusion
micromachining
44. Is directed cell migration in response to a concentration gradient of soluble molecules.
Number of polymers - molecular weight of polymer
Chemotaxis
Endothelial cells
Macrophages
45. A ____ implant is designed to elicit specific - intended to host responses.
Stress
Negative Feedback
micromachining
Bioactive
46. ____- are polymers that can be repeatedly softened by heating and hardened by cooling.
glassy to rubbery
stress
scars
Thermoplastics
47. This type of feedback creates
hypoxin - angiogenesis
Number of polymers - molecular weight of polymer
binding
negative feedback
48. Keloid scars form due to disfunction of ____.
Collagenase/Remodelling
macrophages - proliferation
neutrophils - macrophages
Permanent cells
49. ____ describes the ability of a device to function appropriately in the presence of blood.
Bioactive
Thermoplastics
Regeneration/Repair
Hemocompatibility
50. The trigger for activation of enzymes (anything but endothelial cells!)
Polymers - cross linking of polymers
Extrusion
Stable cells
binding