Medical Breakthroughs β Organ Transplants, Bioprinting MCQs 50 Score: 0 Attempted: 0/50 1. Who performed the worldβs first successful human heart transplant in 1967? (A) Christiaan Barnard (B) Joseph Murray (C) Alexis Carrel (D) Thomas Starzl 2. Which organ was the first to be successfully transplanted in humans? (A) Heart (B) Liver (C) Kidney (D) Lung 3. In which year was the first successful human kidney transplant performed? (A) 1945 (B) 1954 (C) 1962 (D) 1973 4. What is the biggest challenge in organ transplantation? (A) Blood type matching (B) Surgical errors (C) High cost (D) Organ rejection 5. What is the main function of immunosuppressive drugs in organ transplant recipients? (A) Increase blood flow (B) Prevent infection (C) Prevent organ rejection (D) Accelerate healing 6. Which organ transplant is considered the most complex and risky? (A) Heart (B) Liver (C) Lung (D) Intestine 7. What is the most commonly transplanted organ worldwide? (A) Liver (B) Kidney (C) Heart (D) Lung 8. Which country leads in the number of organ transplants performed annually? (A) UK (B) India (C) China (D) USA 9. What does the term "xenotransplantation" refer to? (A) Using artificial organs (B) Transplant between identical twins (C) Transplant from animals to humans (D) Transplant from cadavers 10. Which animal organ was successfully transplanted into a human in a historic 2022 experiment? (A) Pig heart (B) Cow kidney (C) Goat liver (D) Rabbit lung 11. What is 3D bioprinting primarily used for in medicine? (A) Printing CT scans (B) Printing medications (C) Creating tissue and organs (D) Making artificial bones 12. Which bio-ink component is essential for 3D bioprinting? (A) Plastic polymers (B) Human cells (C) Metal powders (D) Carbon fiber 13. What is the major advantage of bioprinting organs? (A) Reduces waiting time for donors (B) Cheaper than surgery (C) Improves fitness (D) Eliminates need for anesthesia 14. What is a scaffold in bioprinting? (A) A surgical tool (B) A support structure for tissue growth (C) A chemical solution (D) A storage system 15. Which organ is considered the most promising candidate for 3D bioprinting in the near future? (A) Heart (B) Pancreas (C) Brain (D) Skin 16. What is "tissue engineering"? (A) Using computers in surgery (B) Engineering bones only (C) Combining cells with materials to form functional tissues (D) Programming medical devices 17. What type of cells are typically used in bioprinting? (A) Muscle cells only (B) Stem cells (C) Fat cells (D) Blood cells only 18. Which technology is most commonly used in bioprinting? (A) Laser etching (B) Inkjet printing (C) Stereolithography (D) Microextrusion 19. What is the main limitation of current bioprinting technology? (A) Speed (B) Cost (C) Vascularization of tissues (D) Licensing 20. Which of the following is a company involved in 3D bioprinting? (A) Organovo (B) Moderna (C) AstraZeneca (D) BioNTech 21. What ethical concern is most associated with organ transplants? (A) Overuse of anesthesia (B) Organ trafficking (C) Radiation exposure (D) Age limits 22. What body system is most affected by organ rejection? (A) Nervous system (B) Endocrine system (C) Digestive system (D) Immune system 23. Which part of the organ donor process ensures recipient compatibility? (A) CT Scan (B) DNA sequencing (C) HLA typing (D) ECG test 24. Which term describes using a patientβs own cells to grow a new organ? (A) Xenotransplant (B) Autologous transplant (C) Donor cloning (D) Retroprinting 25. Which country banned commercial organ trade in 2007? (A) India (B) Brazil (C) USA (D) China 26. Which printing method is NOT used in bioprinting? (A) Inkjet (B) Laser-assisted (C) Dot-matrix (D) Extrusion 27. What is the source of most organ transplants? (A) Brain-dead donors (B) Living animals (C) Robots (D) Artificial organs 28. Which organ can regenerate and is often transplanted in part? (A) Kidney (B) Lung (C) Heart (D) Liver 29. What is the global initiative promoting ethical organ donation called? (A) WHO Donor Code (B) Istanbul Declaration (C) Geneva Protocol (D) Red Cross Act 30. Which breakthrough allowed longer preservation of transplant organs? (A) Hypothermic machine perfusion (B) CRISPR (C) MRI (D) Bio-scaffolds 31. What is the purpose of CRISPR in organ transplantation? (A) Create bioinks (B) Gene editing to reduce rejection (C) Build surgical tools (D) Sterilize donor organs 32. Which organ is most commonly transplanted from living donors? (A) Kidney (B) Heart (C) Lung (D) Pancreas 33. Which major bioprinting challenge involves connecting tissue to blood vessels? (A) Integration (B) Vascularization (C) Flexibility (D) Durability 34. Which advancement could reduce transplant rejection significantly? (A) Nanobots (B) Oxygen therapy (C) Artificial valves (D) Immuno-matching AI 35. Which organ transplant has the shortest average survival time post-surgery? (A) Liver (B) Kidney (C) Lung (D) Heart 36. What is bioartificial liver used for? (A) Permanent replacement (B) Temporary support before transplant (C) Weight loss (D) Detoxifying alcohol 37. Which country recently approved the use of pig kidneys for trials in humans (2024)? (A) USA (B) Germany (C) Japan (D) South Korea 38. How long can a human heart survive outside the body before transplant? (A) 12β14 hours (B) 4β6 hours (C) 18β20 hours (D) 24β30 hours 39. What is the goal of regenerative medicine? (A) Grow organs and tissues (B) Reduce cancer rates (C) Improve surgery techniques (D) Strengthen bones 40. What is a synthetic organ made entirely by machines and materials called? (A) Hybrid organ (B) Clone organ (C) Artificial organ (D) Bioenhancer 41. Which organ transplant can be performed from both living and deceased donors? (A) Heart (B) Kidney (C) Lung (D) Pancreas 42. What material is commonly used in 3D bioprinting scaffolds? (A) Titanium (B) Cement (C) Plastic (D) Hydrogel 43. What was the first organ grown in a lab and implanted in humans? (A) Trachea (B) Liver (C) Pancreas (D) Kidney 44. How are donor organs typically transported? (A) In dry ice (B) In temperature-controlled coolers (C) By drones (D) In saline spray 45. What is the average waiting time for a kidney transplant in many countries? (A) 1β2 weeks (B) 2β3 months (C) 3β5 years (D) 6β8 years 46. Which organization regulates organ donation and transplantation in the USA? (A) FDA (B) CDC (C) UNOS (D) NIH 47. Which technique is used to sterilize bioprinted organs before implantation? (A) Freezing (B) UV light (C) Autoclaving (D) Laser treatment 48. What is the role of bioreactors in tissue engineering? (A) Grow and mature tissues (B) Transport cells (C) Perform surgery (D) Measure organ function 49. What does βdecellularizationβ refer to in bioengineering? (A) Cell mutation (B) Removing cells from an organ (C) Destroying DNA (D) Creating cell copies 50. Which organ transplant is often used to treat type 1 diabetes? (A) Liver (B) Kidney (C) Pancreas (D) Lung