Title: 10_Mission_review

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Main elements

Q: Tissue engineering/regenerative medicine requires three main elements to create a biological substitute to aid the restoration of damaged tissue. Those three main elements are …
- Scaffold, Cells, Growth factor (correct)
- Hydrogels, Scaffold, Cells
- Bioreactor, Growth factor, Gene
- Biomaterial, DNA, Gels

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hydrogel classes

Q: Which class of hydrogel can eventually provide reversible geling, and can for example be reformed after shearing or melting?
- physically crosslinked hydrogels (correct)
- radical crosslinked hydrogels
- enzymatic crosslinked hydrogels
- chemically crosslinked hydrogels

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term definition

Q: With the increase of football popularity, the prevalence of knee injury among players is also rising. We use tissue engineering to treat the articular cartilage injury. The term tissue engineering is interchangeably used with regenerative medicine, which mainly aims to..
- regenerate damaged tissue with a biological substitute (correct)
- replace damaged tissue with the patient’s own tissue
- replace damaged tissue with tissue from a donor
- transplant a new tissue from the tissue bank

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stiffness

Q: The higher its elastic modulus, the hydrogels becomes..
- stiffer (correct)
- more elastic
- more fragile
- less stiff

Which answer is correct?

mechanical properties

Q: The mechanical properties of hydrogels are NOT determined by..
- The site of transplantation (correct)
- Polymer concentration
- Crosslinking density
- The type of polymer

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mesh size

Q: Increasing the polymer concentration and crosslinking density can significantly decrease the mesh size. A hydrogel with high crosslinking density may have excellent mechanical properties. However, with more links to be cleaved, it can…
- hinder cell growth (correct)
- degrade faster
- be implanted easier
- Have a higher swelling property

Choose the correct statement.