1. What does the author mean when he says that the livers aren't grown from scratch?
- The making of a biological scaffold of proteins and extracellular architecture.
- A huge step toward building functioning livers in the lab.
- The building of the infrastructure of a donor liver.
- Growing liver cells in the donor organ.
2. The biological scaffold was not put into the culture in the lab until ____.
- duplicated synthetically
- isolated from the healthy liver
- repopulated with the healthy cells
- the addition of some man-made blood vessels
3. What seems to be the problem in the planted liver?
- The rats are wrong recipients.
- The time point of the transplantation.
- The short period of the recellularization.
- The insufficient repopulation of the blood vessels.
4. The research team holds high hopes of ____.
- creating lab-generated livers for patients within two years
- the timetable for generating human livers in the lab
- stem-cell research as the future of medicine
- building a fully functioning liver into rats
(Reference keys.)