Regeneration, aging, stem cells - One Line Questions

1. In the context of regeneration, what does 'blastema' refer to? — A mass of undifferentiated cells that forms at the site of injury.
2. Which type of stem cell is found in early-stage embryos and can differentiate into any cell type in the body? — Embryonic stem cells
3. Which of these is NOT a factor that typically influences regeneration? — Nutritional status of the organism
4. Which term describes the process of aging at the organismal level? — Senescence
5. The ability of some salamanders to regenerate complex structures like limbs and even parts of the brain is an example of: — Epimorphosis
6. The process by which stem cells become specialized cells is called: — Cell differentiation
7. Which of these conditions is being investigated for stem cell therapy? — Parkinson's disease
8. Regeneration in organisms like planarians is often described as: — Epimorphosis
9. What type of regeneration involves the replacement of lost body parts with identical structures? — Epimorphosis
10. Which of the following is a challenge in using stem cells for therapy? — Controlling their differentiation into the desired cell type.
11. What is the term for the process where a cell loses its specialized characteristics and becomes more primitive? — Dedifferentiation
12. Which organism is often studied for its ability to regenerate its entire body from small fragments? — Hydra
13. The accumulation of non-functional proteins is a hallmark of: — Cellular aging
14. Which of the following is a classic example of an organism known for its remarkable regenerative capabilities? — Starfish
15. The study of aging is called: — Gerontology
16. The accumulation of senescent cells in tissues is associated with: — Age-related diseases and tissue dysfunction
17. In the context of aging, oxidative stress is primarily caused by: — The accumulation of reactive oxygen species (ROS).
18. Which of the following is a potential risk associated with stem cell transplantation? — Immune rejection of the transplanted cells
19. Which of the following is a known consequence of cellular senescence? — Release of pro-inflammatory factors (SASP)
20. A key difference between epimorphosis and morphallaxis in regeneration is that epimorphosis: — Requires the formation of a blastema and growth of new tissue.
21. What is the primary challenge in achieving successful regeneration in mammals compared to simpler organisms? — All of the above.
22. Which factor is crucial for controlling the self-renewal and differentiation of stem cells? — Growth factors and signaling pathways
23. What is the term for the process where cells undergo programmed cell death, which is distinct from aging but can be influenced by it? — Apoptosis
24. Which of these is a type of adult stem cell found in bone marrow that can differentiate into various blood cell types? — Hematopoietic stem cells
25. Which theory of aging suggests that aging is due to the accumulation of damage to DNA and other molecules over time? — Wear-and-tear theory
26. The gradual decline in the function of cells, tissues, and organs over time is characteristic of: — Aging
27. The process of aging is also known as: — Senescence
28. What are the two fundamental properties of stem cells? — Self-renewal and differentiation
29. Which type of stem cell is totipotent? — Zygote and early blastomeres
30. What type of stem cells are found in the inner cell mass of the blastocyst? — Embryonic stem cells
31. What is a hallmark of cellular aging at the molecular level? — Telomere shortening
32. Which of the following is a cellular mechanism that contributes to aging? — Mitochondrial dysfunction
33. What is the primary characteristic of regeneration in biology? — The ability to regrow lost or damaged tissues or organs.
34. Morphallaxis, a type of regeneration, involves: — Repatterning of existing tissues to form a new structure.
35. The 'Hayflick limit' refers to: — The number of times a normal human cell population will divide before cell division stops.
36. Compensatory regeneration is characterized by: — The enlargement of remaining tissue to compensate for lost tissue.
37. What is a major ethical concern associated with embryonic stem cell research? — The destruction of embryos.
38. What is a key characteristic of induced pluripotent stem cells (iPSCs)? — They are reprogrammed adult cells that resemble embryonic stem cells.
39. Induced pluripotent stem cells (iPSCs) offer a potential alternative to embryonic stem cells because: — They avoid the ethical concerns associated with embryo use.
40. What is the primary role of telomeres in relation to aging? — They protect the ends of chromosomes and shorten with each cell division.
41. What is the primary function of stem cells in a developing embryo? — To generate all the specialized cell types of the organism
42. What is the main application of stem cells in regenerative medicine? — To repair or replace damaged tissues and organs.
43. What is the role of the 'stem cell niche'? — To provide a microenvironment that supports stem cell self-renewal and regulates their differentiation.
44. What is the primary goal of research into regeneration? — To develop therapies for tissue repair and organ replacement.
45. Adult stem cells are also known as: — Multipotent stem cells
46. Which of these is a potential therapeutic use of stem cells? — Treating genetic disorders
47. The programmed aging of an organism is often linked to: — Genetic factors and cellular damage accumulation.
48. Stem cells are characterized by their ability to: — Differentiate into specialized cell types and self-renew.
49. Which of the following is a characteristic feature of cellular senescence? — Shortened telomeres
50. Which theory proposes that aging is a result of accumulated errors in gene expression and protein synthesis? — Error catastrophe theory
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